Jelly bean on the OG is AWESOMEE!!!
I've had my incredible for almost two years, it's showing its age a bit but it is still up and kicking. I have stock jellybean brought over by albinoman and it is super slick. I like to keep it pretty vanilla because I want to keep it pretty minimal. The battery life savings in standby are pretty good, I can usually go a whole day on light usage with the stock battery.