When people don't use question marks at the end of questions...
Sorry, couldn't resist.
My friend went to a Tourny recently and he told me this story...
(Shoots some wounds into a command squad)
Friend: Ok, so that's X wounds to these guys, and looks like 2 wounds to your Heavy bolters. So what are you going to roll for?
(A-Hole rolls dice, fails)
Friend: Wait, what are you rolling for? You know you have to declare what right?
A-Hole: Oh, those were for my heavy bolters.
Friend: Um... ok, I guess they died then.
(A-Hole picks up normal bolters)
Friend: Wait, I thought you said those were for your Heavy Bolters?
A-Hole: Yah, they were.
(A-Hole continues to roll dice, save some)
Friend: So are you going to remove your Heavy Bolters then?
(A-Hole begins his turn, declaring Heavy Bolter shots)
I'm still working on a classification for this guy, but here are some I can't stand...
Rules Lawyer. Doesn't matter what the rule is; it's his way or the high way. Disagrees with the 4+ concept and either RAW or RAI. Will stop the game until he finds someone who agrees with him.
Poor Sport. Either get's angry or very depressed when they start losing. Will often go into emo mode saying life is unfair, your codex is stronger or they need to update his army so he can win once in his life.
One-Upper. Their army is always better than yours; they have more options, better painted models, 1 army more than you do, know all the rules, have 2 hot girlfriends, makes more money than you, drives a nicer car and generally has a better existance.
I'm a girl version 1. I once had a girl say; "You know I cry right?" They will use emotions to gain pity favor. Also uses gender bias; girls aren't great gamers, don't like war, etc.
I'm a girl version 2. Similar to the One-Upper, they will attempt to tear down the gender walls if only to establish their own superiority over you. One wonders why they didn't just punch you in the face to prove their tougher than you are.
I'm a girl version 3. Low cut shirt, push up bra and a wild wind blown hair style. It doesn't matter what dice she rolls, because you're obviously not looking at them are you?
Absenty. This person may or may not actually play the game with you. They might see some nifty book they've wanted to read, start chatting with friends or is distracted by either something shiney, or girl version 3.
Just to name a few... there's a reason I don't hit clubs or stores or Tournies.