One thing I don`t like about the Xbox 360 is the fact that, when playing original Xbox games, your account cannot connect to the internet. It means that multiplayer functions in some games (outside of local gameplay) is useless. Examples off the top of my head could be Fusion Frenzy or Halo 2 (although I`m pretty sure there was a remaster of Halo 2 in the Master Chief Collection which allows you to play it online).