Actual mutes. Usually mutes EVERYONE in-game as soon as the game starts. Builds a Lich Bane first item ALWAYS. (I just described myself in a nutshell, haha)
They always play while they're taking a bath and have a bunch of rubber duckies with them. They will ship Disney princesses with ANYONE. ANYONE.
Tough, vicious, and toxic on the outside, but real softies when you get to know one. I once got to know a Riven main so well that she called me a "furry %%%got" instead of "gg feeder, gonna run down mid, plz end fast and report team". Good times.
Super goth and hate life. The slightest sign of a positive attitude will be smote immediately.
Actually owns a falcon named "Valor" in real life. Always hunts and raises Pidgey in all Pokemon games. Probably owns a working crossbow as well. Currently out running around with Pokemon GO open and a transportable charging station trying to find Pidgeys, Spearows, and Rufflets.
Secretly, they're just a bunch of Teemo-loving goofballs that don't take the game seriously at all. They will have ridiculous builds every game, but usually a ridiculous KDA too. They will own either Cottontail Teemo, Super Teemo, or no skin at all. The elite few Teemo-only mains will always take the game super seriously and actually commence a short blood ritual to the Elder Gods before each match. They always own Omega Squad Teemo.
All Mordekaiser mains are secretly Malicious Metal and Worst Morde NA on different accounts. They've been playing for at least 4 Seasons now and have Vietnam-style flashbacks to a better time for Mordekaiser. (Force of Nature)
All Garen mains are Laughing Fish, which explains how he can pump out so many memes.
Basically the Vanilla/Burning Crusade fanboys from World of Warcraft, these guys remind you every chance they get about how Season 1 and Season 2 were so much better and everyone that plays anymore is a filthy casual. They always have Gentleman Cho'Gath.