I don't think I would be able to go back to a smaller sized phone. Many of my friends have the GS3 (based on my recommendations over an iPhone
) and even that feels small. Granted, a 4.8" screen vs a 5.5" screen a 4.8" would seem small but back when I first got the GS3 I thought to myself I would never be able to get something bigger than this. Now this just feels normal, yea its a pain sometimes for smaller pockets but you get use to it.
I actually picked it up next to my parent's iPhone 5s yesterday and the iPhone feels so small and actually feels unnatural to hold in the hand. Granted, the iPhone 5 never felt natural to me since its the same width, but just longer.
Personally, I like the size of both the GS3 and Note 2. You really can't go wrong with either phone, but for me I really do think it would be a big adjusting period to go back to a smaller phone.