This recent topic in the LoL boards here made me think about how certain champions are associated with certain types of behavior in-game, so I was wondering if you also noticed that?
Some of the trends I've seen or at least heard about are:
-The "Easy Mode" champions (Tryndamere, Master Yi, etc.) attract those who like to brag about every kill they get as if they're a gaming god.
-AD carries are assholes in general, but I've find Ashe and Caitlyn players to be the biggest examples of the AD Carry Asshole in motion.
-The number of Karthus players that follow the "Press R" memes are large in number.
-Some of the ganker champions (most notably Shaco) attract the same crowd that Male Undead Rogues in WoW get as the ganker stereotype.
-Some the unpopular champions (notably Trundle) have all the cool and calm players.