I was on Cyanogen 188.8.131.52, Smoked Glass - had a few lag issues and unusual battery usage. I am now on RedRum v1.3 24K Gold and I am loving it. It seems to agree with my phone as well. I do however have everything backed up as well so if I want to switch around I can easily.
Flavor of the week:
Also have Nandroids of Redrum, CM 184.108.40.206, Holy Blue 4.5 And BB v1 to flip through. My phone really seems to like the Chaos themes, and BB not so much.
Sometimes I switch up more than once a day. It's funny how addictive it is.