Oh, man - FO:NV is awesome. I so love that game.
And make sure you check out Old World Blues DLC content.
All of this ARPG talk of TQ, TL2, Diablo 2, etc - ugh! Maybe it'll soon be that time to eventually get back to some ARPG's...
I played the first 3-4 hours of FO:NV on my Xbox 360 when it first came out, but I really found myself hating the music. It was frustrating that the music in FO3 was SOOO good. When I found out last week that I could mod New Vegas to add the GNR (Galaxy News Radio, not Guns N Roses!) songs into New Vegas I fired up a new campaign and I'm already 13 hours in and loving it. Oh, and I changed the Pipboy color to green.
EDIT: I feel like one of those stodgy old Windows users that refuses to use anything other than the "Classic" theme and won't upgrade past Windows XP.