Otaku's Top Picks

Best Anime : One Piece
Best Action : Fate/ Stay Night Unlimited Blade Works
Best Adventure : One Piece
Best Classic : Digimon Adventure
Best Comedy : Baka to Test to Shoukanjuu
Best Drama : Kokoro Connect
Best Fantasy : Hataraku Maou-sama
Best Harem : The World God Only Knows
Best Mecha : Code Geass
Best Military : Senjou no Valkyria
Best Music : Tari Tari
Best Mystery : Hyouka
Best Psychological : Death Note
Best Romance : Clannad After Story
Best Sci-fi : Steins;Gate
Best Slice of Life : K-On!
Best Sports : Kuroko no Basket

It's all subjective of course  

Really good thread, Mr. Kenjo...

Best Action : Fairy Tail (Natsu's actions really cool in my eyes!)
Best Adventure : One Piece (Adventure anime with 400+ episodes really awesome!)
Best Comedy : Gintama (my only favorite anime in Comedy genre ; it's really worth download all of its episodes)
Best Ecchi : Kiss x Sis
Best Fantasy : Sword Art Online
Best Harem : High School DxD
Best Music : AKB0048 (one of my favorite animes ever, even my avatar's based on it because I love them!)
Best Psychological : Death Note (scary if Death Note and Light really exist in real world)
Best Romance : Clannad (and its sequel ; the story's very touching)
Best Sci-fi : Steins;Gate (my only favorite anime in Sci-fi genre)
Best Sports : Eyeshield 21

for now this is my best

Best Slice of life: K-ON, Gin no Saji
Best Romance: Tasogare Otome X Amnesia
Best Comedy: Gintama(only love the part where shogun appear for the comedy)
Best Horror: Corpse Party: Tortured Soul
Best Mystery: Eden of The East
Best Sci-fi: Ghost in The Shell series
Best Thriller: Hellsing Ultimate
Best Fantasy: Maoyuu Maou Yuusha
Best Supernatural: Monogatari series, xxxHolic

Best Action : Hunter x Hunter
Best Adventure : One Piece
Best Parody : Gintama
Best Classic : Cowboy Bebop
Best Story : Durarara!!
Best Comedy : Danshi Koukousei no Nichijou
Best Drama : AnoHana
Best Strategy: Death Note
Best Fantasy: Sword Art Online
Best Harem : The World God Only Knows
Best Mecha : Evangelion
Best Horror : Corpse Party
Best Music : Mushishi
Best Mystery : Zankyou no Terror
Best Psychological : Death Note
Best Romance : Kimi ni Todoke
Best Ecchi: Golden Boy
Best Sci-fi : Steins;Gate
Best Slice of Life : Gin no Saji
Best Supernatural: Jigoku Shoujo
Best Sports : Slam Dunk

Awesome List Man...^_^