Well, I've watched Pokemon, and Digimon and Doraemon and Sailor Moon and Dragon Ball and etc when I was little xd. Apart from that, I watched 1 episode of Fairy Tail, 3-4 episodes of Bleach and I watched Naruto all the way till Guren Filler, when I dropped it out of annoyance. So the only anime I've watched was One Piece...
I'm now watching Deadman Wonderland and Hellsing, so I guess my top would be:
1.One Piece
2.One Piece
3.One Piece
4.Hellsing
5.Deadman Wonderland
6.Naruto (Without fillers)
Everything else...