It's all about genetics. That's why i will never compete in a contest despite some people pestering me to. While i may rival the size of some amateur Malaysian bodybuilders, i have no bicep peak whatsoever despite being able to barbell bicep curl almost 50kgs in ultra strict form. As you can see from my avatar, my arms, while at 17 inches and growing are mostly triceps, that's at least one area i've got good genetics in but it's small consolation.

Just keep working out hard, brothers in iron. Eat right, train smart and i promise you guys will grow.