I was just looking at the Social Club stats pages for another thread, when I noticed there's a section that tells you your overall combined kills, deaths, headshots, drive-bys, accuracy, etc. Now I'm curious at just how many kills/drive-bys, etc that people have. You can find this page by going to the Social Club, selecting your character, and then going to the weapons tab.
Here's mine below. I'm actually kind of surprised to only see 20,000 or so total kills. I've been playing this game pretty heavily for months, yet I'm nowhere near my Halo levels. In the just about two months it took for me to get bored of Halo 4, I left off at 50,000 A.I. kills. (Only had about 1,400 player kills) I didn't play Halo 4 nearly as religiously as I do GTA:O. Guess there's just less things to shoot in GTA:O overall. Also, lol at like 30% accuracy. I guess if I'm shooting at something, I have a 70% chance of missing it, and a 25% of killing it with a head shot.