I just installed Windows 7 on my Mac so that I could get TOR when it came out (a friend is getting it and, having been a huge EQ/UO fan back in the day, I decided I'd jump on the bandwagon. I knew a few friends who played Oblivion back in the day, but - being more of an MMORPG kind of a guy - I never gave it a second thought.
I got Skyrim, after hearing about all the buzz, so that I could test how well it runs on Windows 7 running on my Mac (in preparation for TOR). Long story short: I am not at all dissapointed and it reminds me of a single player version of Everquest (which I happened to be obsessed with back in the day).
I just wish I wasn't so busy - barely have time to play.