A.
Abiding, Abloom, Accordant, Admirable, Admired, Adonic, Adorable, Adored, Adoring, Adventuresome, Ae, Affectionate, Afflated, Afflating, Ageless, Agile, Alacritous, Alaudine, All heart, All systems go, Alluring, Amaranthine, Amazing, Ambrosial/Ambrosian, Amorous, Ample, Angelic, Aperitive, Appetent, Apollonian, Appealing, Appetizing, Ardent, Arousing, Arresting, Astral, Attentive, Attracted, Attractive, Atypical, Auroral, Auspicious, Available, Avid, Awesome
B.
Beaming, Beamish, Beauteous, Beautiful, Becoming, Bedazzling, Beloved, Besotted, Best, Best-loved, Bewitching, Beyond compare, Blossomed, Blossoming, Blooming, Bodacious, Bonny, Bonzer, Brazen, Breathtaking, Brilliant, Buccal, Budding, Buff, Buoyant
C.
Candescent, Canoodling, Canorous, Canty/Cantier/Cantiest, Captivating, Cared for, Caring, Celestial, Charmed, Charming, Cherishable, Cherished, Cherry, Choice, Choicest, Chosen, Classy, Clear-eyed, Cock-a-hoop, Coequal, Columbine, Come-at-able, Comely, Comforting, Companionable, Compassionate, Compatible, Compelling, Commutual, Confelicitous, Conjugate, Consensual, Consentaneous, Consentient, Convivial, Copacetic, Coquettish, Coruscant, Cosmic, Courtly, Couthie, Cozy, Coy, Crazy about, Creamy, Crepuscular, Cuddly, Curvaceous, Curvy, Cute
D.
Dapatical, Dapper, Darling, Dashing, Dazzling, Dear, Dearest, Debonair, Delicate, Delectable, Delicious, Delightful, Demulcent, Desirable, Desired, Devoted, Dewy, Disarming, Divine, Doted on, Doting, Dovelike, Dreamy, Dulcet, Dynamite
E.
Eager, Easygoing, Easy to approach, Easy to talk to, Effervescent, Effulgent, Elated, Elating, Electric, Electrifying, Elegant, Eligible, Empyreal, Empyrean, Enamoured, Enamouring, Enchanted, Enchanting, Endeared, Endearing, Endowed, Energizing, Engaging, Enjoyable, Enjoyed, Enlivened, Enlivening, Enough, Enrapturing, Enriching, Enthralling, Enticed, Enticing, Entrancing, Epic, Epigamic, Equable, Equal, Equiparent, Equipollent, Erogenized, Euphonious, Evocative, Exceptional, Exciting, Exhilarating, Exquisite, Exotic, Extraordinary, Eyesome, Eye-catching
F.
Fab, Fabulous, Fair, Faithful, Fantastic, Fantabulous, Fascinating, Favoured, Favourite, Feateous, Feelgood, Feline, Feminine, Fetching, Fiery, Filled, Fine, Finer, Finest, First-class, Five-star, Flavourful, Flavoursome, Flawless, Flexible, Flirtatious, Flirty, Forbearing, Fond, Foxy, Frabjous, Fragrant, Fresh, Friendly, Frisky, Frolicsome, Fulfilling, Fulgent, Full, Fun, Funny
G.
Gallant, Game, Gamesome, Generous, Gentle, Gentlemanly, Genuine, Giving, Glabrous, Glamorous, Gleaming, Glistening, Glowing, Gnarly, Golden, Good, Goodhearted, Good-humoured, Good-looking, Gorgeous, Graceful, Gracile, Gracious, Gradely, Gratifying, Gymnastic
Good grammar grants genuine graces. Genial gossip is generalization that generates genuine good-hearted gestures. Grammatical growth is generous, gleeful, good-natured, gracious, and gratifying. Growing grammar gallantly gives geniality grace and gains general gratification glorifying God's great game.
For more words that describe a person, and start with a particular letter, try Positive Nouns.
H.
Handsome, Harmonious, Haunting, Heartfelt, Heart-stopping, Heartwarming, Heavenly, High-class, High quality, High-spirited, Honeyed, Honourable, Honoured, Hot, Huggy, Huggable, Hunky, Hypnotic
I.
Ideal, Illecebrous, Illimitable, Immeasurable, Impassioned, Impeccable, Impish, Impressive, Incandescent, Incomparable, Indomitable, Inebriating, Ineffable, Infatuated, Infatuating, In fine fettle (good spirits), Infinite, Inimitable, In my heart, Inseparable, Inspiriting, Intemerate, Intense, Interconnected, Interesting, Intertwined, In the now, Intimate, Intoxicating, Intriguing, Invigorating, Inviting, Irrepressible, Irresistible
J.
K.
Kind, Kind-hearted, Kissable
L.
Ladylike, Laudable, Lepid, Liberating, Liefly, Likable, Liked, Like-minded, Light, Limber, Limpid, Lissome, Lithe, Lithesome, Lovable, Loved, Lovely, Lovesick, Lovestruck, Loving, Loyal, Lush, Lusory
Positive Words That Describe Men
M.
Mad about, Magical, Magnetic, Magnificent, Major League, Manly, Mannerly, Marmoreal, Marmorean, Masculine, Massagable, Matchless, Maximal, Mellifluous, Melliloquent, Mellisonant, Memorable, Mesmerizing, Miraculous, Mirthful, Mischievous, Moonstruck, Most excellent, Moving, Muliebral/Muliebrile/Muliebrous, Multidimensional, Muscular, Mutual
N.
Natty, Natural, Near to one's heart, Necessary, Needed, Never-failing, Nice, Nifty, Nimble, Noctiflorous, Nonpareil, Nourishing, Nubigenous, Nubile, Number one, Numero uno, Nutty about, Nuts over
O.
Obliging, Olymian, One and only, Oneiric, Open, Open-hearted, Open-minded, Optimal, Optimum, Original, Orphean, Oscular, Out-of-sight, Out-of-this-world, Outstanding, Overflowing, Overjoying
P.
Paradisiacal, Participative, Participatory, Passionate, Peachy, Peach-like, Peachy keen, Perky, Partial, Perfect, Peregal, Personable, Personal, Pert, Petite, Phenomabomb (slang), Phenomenal, Picked, Picturesque, Pierian, Pillowy, Piquant, Playful, Pleasant, Pleasing, Pleasurable, Plum, Plummy, Poetic, Polite, Porcelain, Positive, Pouty, Precious, Preferred, Prefulgent, Premium, Prepossessing, Pretty, Priceless, Primal, Prime, Principled, Profulgent, Provocative, Prized, Prize-winning, Promising, Pulchritudinous, Pukka, Pure
Q.
Qualitative, Quality, Quintessential, Quixotic
R.
Rad, Radiant, Rapturous, Rare, Rascally, Rathe, Ravishing, Receptive, Recherche', Recipient, Reciprocal, Redolent, Refreshing, Refulgent, Rejuvenating, Relaxing, Reliable, Relished, Remarkable, Respectable, Respected, Restorative, Revitalizing, Rewarding, Rhapsodic, Right on, Robust, Rollicking, Romantic, Rosy, Roused, Rousing
S.
Sanguine, Sassy, Saucy, Satiny, Savoury, Scented, Scintillant, Scintillated, Scintillating, Scintillescent, Scrumptious, Second-to-none, Select, Selected, Sensate, Sensational, Sensual, Sentimental, Shapely, Shimmering, Shining, Shiny-eyed, Shipshape, Sightly, Silken, Silky, Sincere, Sinewy, Sinuous, Sleek, Smashing, Smiling, Smitten, Smooth, Snazzy, Snugly, Soft, Solacious, Solid gold, Something else, Sonsy, Sought, Sparkling, Special, Spectacular, Spellbinding, Spicy, Spiffy, Spirited, Spiritual, Splendiferous, Sponsal, Sprightly, Spunky, Statuesque, Stellar, Sterling, Sthenic, Stimulating, Stimulative, Stimulatory, Stirring, Strapping, Stunning, Striking, Stylish, Suave, Suaveolent, Suaviloquent, Sublime, Sufficient, Suitable, Suited, Sunny, Super, Super-angelic, Superb, Super-duper, Super-excellent, Superior, Superlative, Supernal, Supple, Supported, Supporting, Supportive, Supreme, Surpassing, Svelte, Swaying, Sweet, Sweet-smelling, Swell, Sybaritic, Synergistic
T.
Tantalizing, Tasty, Teasing, Tempean, Temperate, Tempting, Tender, Terrific, There, Thoughtful, Thrilling, Ticklish, Tip-top, Toothsome, Totally-tubular, Top drawer, Tops, Touching, Transcendent, Transnormal, Transporting, Treasurable, Treasured, Tremendous, Trim, True, True-blue, Trusted, Trustworthy, Trusty, Twenty-four carat, Twitterpated, Twitterpating, Tympanic
If I could change the alphabet I'd put U and I together.
U.
Uncommon, Unconditionally loving, Unencumbered, Unequalled, Unfettered, Unified, Unifying, Unique, Unisonous/Unisonal/Unisonant, United, Uniting, Unlimited, Unparalleled, Unrivalled, Unsurpassed, Unusual, Unwithdrawing, Upbuilding, Up front, Uplifting, Uxorial
The original meaning of Valentine
V.
Valuable, Valued, Vegete, Velvety, Venerated, Venust, Vespertine, Vibrant, Vigorous, Virile, Vital, Vitalizing, Vitative, Vivacious, Vivifying
W.
Wanted, Warm, Warm-hearted, Welcome, Welcoming, Well-built, Well-liked, Well-made, Well-proportioned, Well-received, Well-suited, Wild, Wild about, Whimsical, Whiz-bang, Wholehearted, Willing, Winning, Winsome, With it, Without equal, Womanly, Wonderful, Wondrous, World class, Worthy
Y.
Yummy