What do you is the most fun Jutsu to use. You can only post 2 jutsus. I think it's Sexy Clone Jutsu and the Edo Tensei.
Sexy Clone Jutsu, you can have 'fun' with yourself but with the opposite gender and maybe even have sexy looks. :o
Edo tensei, you can kill someone secretly get their blood. Kill someone else and then revive the guy you want to revive. Do the same, and you can get two people that you revive and command them to fight each other.