Don't get thrown into a random server, with players who grief, cheat, or quit when the going gets rough. Find other like-minded players, and get more fun out of your games.
Worried that you won't be able to find a suitable game or players when you want to play? Set up your own game, that other players can sign up for. Or, search for and find games for your playstyle, in a database of all types of games.
Have a group of players that you enjoy playing with? Set up a group, clan, or guild to schedule group-only events. You also get private group forums, and group event listings.