just vlited/installed Windows 7 RTM x86 (Retail Ultimate), will be upgrading my Vista SP1 x64 soon.
I like it so far, but haven't used it too much. I would stick with XP forever if I could, but on newer hardware it's time to move on.
I wonder if Windows 7 x64 will let you permanently disable driver signing, Vista doesn't. Vista's super nazi kernel protection really bugs the hell outta me too. It's like gun control, only the criminals gain access to the kernel while legitimate users are blocked.