BIceps, lats, and traps. Bi's would be fine but your tri's take away from it a good bit. Aeshetics brah, keep the proportions.

And I think I saw your post on /fit/.

Better, but you need a bigger mirror. Tiny mirror is tiny. What's your bf% at?

Can't help it, it's my bathroom mirror. This one was taken at my Uni gym.

15% or 16%, I think. Most of my fat is around my chest, bellybutton and a bit on the love handles right now.

You probably have. Trying to get a proper critique while they're talking about dicks is very difficult.

Well, i've done most of my fitness through my school's wrestling team, but I managed to build up my chest through wide-arm pushups and dumbbell flies. Regular pushups don't hurt either.

When working on chest, just remember this:

Wide grip works chest mostly
Middle grip is both fairly evenly
Narrow grip works mostly triceps.

Also, remember these tips for abs, when you work on them:

Always keep your head off the floor, and preferably your shoulders; this engages your abs the whole time.
Work both upper and lower. Crunches work upper, leg lifts/flutter kicks work lower. Bicycles work both fairly evenly. Throw in sets of planks to work on long-term resistance training.

Arms are looking good, though! I haven't seen your back, so try wide-grip pull-ups.

Best back pic I have.
I don't really need to work abs so much as I need to cut. I've got a plenty strong core and plenty strong abs.

Back's looking pretty good then, don't think you need to work on them so much.

I assume you have great leg strength too.

You're set, man!