Are we talking anime we've watched all of, or just anime we've seen? >_>
If completed or anywhere near it...
1. Naruto
2. Dragonball/Dragonball Z/Dragonball GT
3. YuGiOh! (Watched up to Battle City)
4. Pokemon (Up to Orange Islands)
If you mean just seen it at all...
1. Naruto
2. .heck//SIGN
3. Zoids
4. YuYu Hakasho
5. Bleach
6. Zatch Bell
7. Mobile Suit Gundam
8. Dragonball/Dragonball Z/Dragonball GT
9. YuGiOh!/YuGiOh! GX
10. Card Captors Sakura