hahaha when the first assassin's creed came out, i got that for christmas and an axe deodorant in my stocking, and i always associate that smell with assassin's creed. same with an axe bodywash for falcon 4.0 allied force and some weird air freshener with starwars battlefront 2!
there is no way of telling for skyrim, but the day i play it i am going to surround myself with amazing smelling things. so a good smell goes with a good game.
edit: also the album, "the wall" by pink floyd will always remind me of oblivion.