I'm personally pretty pleased with Firefox and found every new release to be an improvement so far. The fact that sometimes a configuration setting disappears from Preferences and then has to be set through about:config, it's not ideal, but not exactly a big deal either since I only have to do it once.
Regarding the awesomebar, though -- using the "oldbar" extension I can get the old, sparse look back, and using a few about:config changes I can get most of the FF2 behavior back, but the one thing I always wanted the FF url bar to do is simply sort the drop-down by access time, so the least recently used ones are on top. Mozilla always did things this way; at some point I submitted a patch to mozilla.org that implemented the same behavior in FF2, but it never got picked up, and we got the "you'll learn to love it, trust us" awesomebar instead.
I've used FF3 for as long as it's been out, and it still bothers me that selecting a url from the url bar drop-down doesn't just move it to the top of the list immediately. Add an about:config setting to get us that behavior, and I'm sure that a lot of the awesomebar-related whining will stop.