I've never actually thought about gore. So long as it doesn't look out of place it is fine.
However, some of the ragdoll physics used in shooters need to get the hell out. BF2, I'm looking at you.
EDIT: Oh, and fanboys, Gears of War has always suffered extremely from even the slightest bit of lag.
Worst netcode I've ever seen in a game. Host shotgun anyone? Yeah, that thing were if you were the host your shotgun blasts always registered, whereas if you happened to suffer the misfortune of playing more than a state away your shotgun pellets might as well be made out of rubber.
Gears of War 2 is no different, with your shotgun blasts, when fired from the hip, having a good chance of going straight into the ground.
What other game does that? Oh, and couple that with a broken matchmaking system (that was only barely improved) and you have a game that should have never left Beta.