Call of Duty: Black Ops II

I'd say a bit of both. I dislike camo being for headshots rather than kills, but I like that the camos aren't as far apart towards the end as in MW3.

I prefer this game's system. I can jump into FFA and easily get 8+ headshots per game so it doesn't take long to get 100 headshots.

DirrtyRockstarr posted...

I've always preferred getting headshots for camo.

Even if it took 250 headshots to get a gun Fall in MW2, it was so satisfying to get it.

This. Just getting kills for camos didn't feel accomplishing. I missed the MW/MW2 headshot camo system and was really happy they brought it back.
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Currently playing: Black Ops 2, Assassin's Creed 3

what was the mw3 system?

This way encourages boosting IMO. Plus the people camp Hardcore for the difficult OSK challenges. I feel a mix of both would be good 750 kills for Kyrptek then the challenges but 30 revenge medals is too many.