Mine WAS Skyrim, but Bethesda seem to be going in the direction they took Fallout in, mechanic-wise at least, and I hated those games, so I'm not so sure anymore, we'll have to see.
It's now probably between Space Marine, Assassins Creed Revelations, and Saints Row 3. SM because I'd love a good, fun, hack'n'slash. ACR because the franchise has been awesome so far and we're closing out Ezio's story. SR3 because I've never played one, but seeing some videos it looks like pretty much what I miss from GTA games...FUN, rather than another job...and Roman...