Really your motives are based in aesthetics, which i disagree with

Lucky for you, I can tell by your pullup numbers and your physical appearance that you lack a certain degree of strength.
The good news is that you likely have a decent strength to body weight since you are satisfied with your tricking, which means that you have decent technique and strength to flip and twist, if I understand you correctly.
The bad news is that you are probably weak on absolute terms (compared to others).
Have you done heavy lifting in the "core lifts" before? These "core lifts" include the Squat, Overhead Press, Bench Press, Deadlift and Clean/Power Clean or Snatch.
I suggest you get started on a core lifting program. The one that I would personally recommend is this:
www.startingstrength.comThis would be the way to go for several reasons:
1) It will make you stronger in EVERY domain (pulling, pushing, parkour, tricking, jumping, etc)
2) It will elicit the hormonal response that you need to increase muscle mass and reduce BF%.
3) You will gain more confidence since this progression is rather fast, and you will be stronger than you imagine in no time.
There are several threads on Starting Strength in this forum.....for your convenience...
http://www.americanparkour.com/smf/index.php?topic=10781.0You can also do a search for starting strength.
Buy the book. Look up videos on the form of the lifts mentioned there. Hell, if you can, get a weightlifting coach to help you with form and just let him know you are doing a Starting Strength Linear Progression for Novices. He may know what you're talking about - if not, you will know what that means after the book. Get into it. You will see the results that you want to see.