I highly recommend :

Soul eater ( << so funny.

)

Code Geass ( << Mind Bending [Best Anime ebur] )

DeathNote ( << Brain Twisting )

Rozen Maiden ( << 100% Cute, especially Shinku

)

Full Metal Alchemist ( << tragic, sad, funny, action

)

Shaman King ( << OVERSOUL!!!!!!!!! zing sheng jeng jeng pew pew booom!! ) Haha.

Beck : Mongolian Chop Squad ( << best for music lovers )