general notes: Shadowrun as a system encourages specialization, because of the many, many options available to characters. It also punishes over-specialization, by making the extremes so costly that you can't do anything else at all.
So, generally speaking, when building a character you should pick either:
One thing that you do really well (13+ dice), 3-4 things that you do okay (6-9 dice), and a few things that you are functional at (4-6 dice).
OR
Several things that you do reasonably well (10-12) dice and a few things that you are functional at (3-6 dice).
For instance, the hacker Technomancer is of the second variety, being reasonably good at data manipulation, cyber-infiltration, and cybercombat, and functional in stealth and influence actions. The troll, meanwhile, is of the first variety, being insanely good at soaking damage and moderately good at melee at melee attacks, melee damage, ranged attacks, and ranged damage, and functional in stealth and intimidation.
For making your character, pick 3-6 things that he can do, decide which he is Excellent at, which he is Good at, and which he is Okay at (but still above average). Then build that way.