Stock gingerbread ROM with HONO's kernel for me! CM9 just isn't as smooth for me, and while the ICS leak is as smooth (if not a smidge smoother than GB stock), the screen digitizer driver seems to not be perfectly calibrated (most noticeable and annoying when using swype or other "dragging/drawing" apps) on the ICS leak, AND it seems in ICS they screwed with the way zooming on images is handled.
1.) First, when web browsing, text doesn't auto align like it used to in GB, regardless of browser (with the exception of Opera, but I don't really like that browser very much)
2.) In email apps which DO allow pinch to zoom on emails with lots of images (such as touchdown and K-9), you can't seem to zoom out anymore in ICS when you could in gingerbread, so you're forced to have to slide around a ginormous email image to take a look at it rather than zoom out entirely and get an overview.
If anyone else knows of an email app that allows pinch to zoom to zoom OUT of a large email far enough to get a complete page overview in ICS, let me know. (I'm aware K-9 and touchdown still allow the zoom function, but they seem to cap how far you can zoom out in ICS far below getting a full image, when this isn't the case for these programs in gingerbread. Some strange global setting in ICS, it seems...)