I've been happily using Arch for the past 3 years, but installed the latest Ubuntu a week and a half ago. I happily used Ubuntu before I used Arch, but my experience with Ubuntu over the past week and a half was pretty bad. I think its really Unity that I hate, not Ubuntu itself - Unity is slow as hell, really buggy and the user experience has been pretty bad... can't wait to reinstall Arch in a few days.