If you like skyrim you may enjoy dragon age as an idea.
With Skyrim there should be a warning saying it is very addictive you will find out when you have put the controller down that your wife has left you, you have not been at work for so long and have been dismissed and your house is being repossessed due to lack of funds
With assassins creed revelations I wouldn't bother, all on the Second game and story line are good, but with 3 games making assassins creed 2 in essence it gets somewhat repetitive even when doing the extra missions like finding all the symbols and solving the pain in ass puzzles. I think AC:2 and AC:2-Brotherhood where very good, AC:2-Revelations felt to much same ol same ol. However one thing I will give revelations credit for is a few missions really fealy cinematic gameplay wise which I was impressed by, such as when you are chasing the templars in the boat and they are firing at you, when the arsenal is in flames etc...
Forza 4 was somewhat of a let down to 3 for me in sameways
Bioshock one is good, bit old but a very good game
Maybe a jetfighter game? Ace combat and Hawx are fun but to arcadey, a good game on xbox is Over-G, ignore the reviews its one of the best air combat games there despite once again its age, just make sure you change controller settings as the game developers decided to use a retarded controller setup as default where you can't yaw the aircraft and it feels like you are playing that SNES game with the Fox. But you do setup planes properly in terms of missiles, how much fuel onboard, enabling landing gear/hook etc...
