I use the 2.3.3 gingerbread CM7 rom. I don't like the sense rom they have. I don't like the hero style bar on the bottom. Plus it's only 2.2. I don't mind the vanilla, there's just two things that bother me though. No option to disable always on mobile data to save battery, and last used apps aren't in the notification bar like on sense. Those are the only 2 things I miss from sense. Oh yeah and no flash
sense has flash lite. CM7 gingerbread has A2SD. I have 54 apps on my phone right now and my internal memory is 93mb! w00t