So, I've been rocking Crackdown lately. So far, I've managed to eliminate all of the bosses from the first 2 gangs, and a handful from the last one, and I've found all the bosses. I've also collected every weapon according to the lists I've found on various sites.
I also have done pretty well at building up most of the specs:
Agility: 4 stars / 40+
Driving: 2 stars / 18+
Explosives: 4 stars / -- (maxed)
Strength: 4 stars / 41
Firearms: 4 stars / 91+
So, I *almost* have my firearms completely maxed out, while my agility and strength almost half way through the last star. My driving level, though, sucks. I'm going to have to start taking vehicles out, though I typically find it faster to just go on foot. I don't much care for the driving in this game.