While I don't watch that much anime (I do read shitload of manga though) I've re-watched 12 kingdoms 3 times.
Seto no Hanayome and Saki.
Does movies count?
I saw Evangelion 2.0 14 times in a row when it came out several years ago.
I know what you meanLouis13 wrote:
All 3 seasons of Saki 7 times (I have an unhealthy obsession with that show)