[mangusbrother]

well i can't give an exact order...
here are my top though:
shakugan no shana
xxxHolic
katekyo hitman reborn
bleach
full metal alchemist (brotherhood particularly)
gintama

followed by: (again in no particular order)...
rosario + vampire
lucky star
suzumiya haruhi no yuutsu
darker than black
d-gray man
fairy tail
history's strongest deciple kenichi

i'm watching some new ones.. they might enter in it.. at least they have potential:
working!!
ichiban ushiro no daimaou
kaichou wa maid-sama!

here is my anime list either way