Ahem *clears throat*

1. Speaking to good players without them thinking I am hitting on them.
Lol, that's so true, man! 
Anyway, I guess I'll try and provide a serious answer for once, uh? Just for a change...
Things I'm good at:
1) raging. I don't care what you think, my rage always has style 
2) aggressiveness in team games. I have... Yet to find* a player that manages to be as aggressive and reckless as I am in team games, and brings down the average match timer as much... If I can say so myself. This is not always a good thing, of course (see below).
3) aim. I worked hard to improve it, and I think I can safely say it's at least pretty good now. I used to be able to pull off pretty insane shots with the Javelin, when I used to play regularly. Oh, the Javelin 
4) headknowledge™. I think it's safe to say that I'm usually pretty knowledgeable when it comes to ME3 mechanics.
5) keeping in mind that it's a co-op game. Cause, you know... People seem to forget that sometimes. I'd like to think this is a good thing.
Things I'd like to get better at:
1) not raging. As much as there are people who tend to forget this is a co-op, there are also people who tend to forget it's just a game and it's played for fun... And I'm afraid I'm just one of them. I have a long way to go on this one 
2) see above. My aggressiveness helps me kill stuff faster than other people, but it also hinders my survivability. I like to think I'm pretty good at surviving when I'm not playing overly aggressive, I just... Don't do that very much
People can usually still count on me for clutching, cause if I'm alone I play more defensively, but... I'm usually the first one to go, not the last XD
3) dealing with lag. A very good bunch of my raging comes from lag related issues. Seriously, my connection is just goddamn awful, so I like to think I'm at least slightly justified, but... A good portion of this is also due to me outright refusing to deal with lag in a reasonable manner. I *could* adapt my playstyle when lagging heavily, I *could* play more definsively, I *could* expect things not to go the way they should go... But I just don't 
4) playing less than optimized kits and loadouts. I... Just have fun roflstomping the game. I know some people don't understand how one could have fun having no challenge, and I'm not sure what I can say... I just have fun this way. The timer is my challenge
So I'm very much not used to play loadouts that I judge less than optimized. Which means I haven't used more than... Half a dozen guns in the last two years or so. Maybe slightly more.
5) I guess aim can be here too, cause you never get good enough at that. I'm also not as good as I used to be, so I wouldn't mind getting back there. Not gonna happen if I play as rarely as I do, but oh well, I can live with it.
*Actually, there were some players who fit that description... They just don't play anymore.