LoL is free is its worth investigating and giving a try (League of Legends)
As for MW3, I can't really give any good news about that.. all my friends complain about it and say its MW2 and have all sold it now so..
SC2, its a good game and worth having.. Though the only major enjoyment i get out of that is 2v2/3v3 with friends
Skyrim... Is amazing.