As far as single-player games. Personally I'm the type to only be playing 1-2 games at any one time (usually just one), and I'll just play them until I beat them (or get bored) and then switch to something else. Not counting something like Street Fighter where I might just hop online and play a few rounds.
Never could be one of those people playing thru like six games at the same time, that would just totally kill my muscle memory for any of the games.
Never could be one of those people playing thru like six games at the same time, that would just totally kill my muscle memory for any of the games.