I tried AOKP with Fluxxi and it is stable. Also tried Paranoid Android. However I will still say that there is some issue with the ICS touch response/sensitivity. How much ever I tried to tweak the sensitivity it is still not at par with Ginger bread.
Some might say, its not a big deal but it saddens me that with ICS android is still not at par with iOS and WP7 with respect to touch response.
Also, battery life for me has been pretty bad on ICS roms and I consider myself a medium user. with ICS my phone typically lasts 10-12 hrs with 2-3 hrs of screen on time. I have tried keeping the brigtness to a minimum which squeezes a bit more out of the battery but it is pretty irritating working on a dim screen especially when we have a super Amoled Plus screen.
TO really understand what I am talking about (touch sensitivity) I would encourage all of you to try out a GB rom for a few days - especially the UnOriginal Rom. I did not realize how bad ICS touch sensititvity was untill I tried out this ROM. DO give it a shot if only for a few days.
I am currently decided to go back to Gingerbread - UnOriginal 1.4.6 ROM and give it a whole week of run to gauge the battery life. I am verry happy with this ROM so far - I will stick with it if the battery life turns out better. I remember when I was on stock GB ROM I used to go atleast 24-30 hours with medium usage. Never had that kind of life on any ICS ROM.
Again, these are jsut my opinions - yours obviously may differ as will your experience with the various ROMs.
Device: Galaxy Nexus GSM
ROM/Kernel: Bone Stock
Previous devices: iphone 3Gs, Blackberry 9800, Palm Pre+, SGS2, HTC One X, SGS3