For me.. Tsubasa Chronicles, Tengen Toppa Gurren Lagann and Great Teacher Onizuka.. ) yea love all of them.. Everytime I watch them i don't get bored.. )
There are all kinds I watch but most of the ones i watch the most are Code Geass, the first 3 Episodes of Cowboy Bebop, Full Metal Panic! Fumoffu, Of course Dragonball Z, and most of the Gundam Series I find myself watching. Then i fall asleep to Pokemon all the time and *Don't Laugh* Hamtaro. I can always fall asleep to Hamtaro
I don't watch the anime over and over, because it's so long, but I watch the DBZ movies I have over and over. I don't even know how many times I've watched the first Broly movie, but it's been a lot, lol.
I love rewatching the old Pokemon episodes. Other than that, I usually don't rewatch anime, unless I haven't seen it for awhile and I'm trying to get back into it. =D