I'm a true gamer and I can't give a single piece of fudge for either... Casuals = people who play games casually. They have none to below average knowledge on games. MLG = people who only play online in one single game for a very long time and think they're the best at it. while funny enough Gamers = people who like to play games as a hobby and have below average to good knowledge about games. Sometimes perfect knowledge about a game or two. Though I do agree that private matches wouldn't hurt anyone. You shouldn't get experience or anything for it however. They're just matches for funsies with friends.