Its actually kind of obvious to me. Its easier to manage one (and anyways, its easier to manage one), and here are some reasons:

-You level more

-You also spend more time with it

-You just chill with one game

-I'm just happy that way so ha!

-Its really easier to manage one so you don't have to suddenly go to another game

-Taking care of a bunch games are kind of hard...right?

-Your friends can at last breathe in your game

-You can explore more

-Having more that one game can get your mind bamboozled

-This is meant for MMOs

-Other game systems...you're find (i.e. XBOX 360, Nintendo DS, Wii, anything like that)

-Again,

Wingozillius