BigJohn,
you definitely have to give Socom: U.S. Navy SEALs. There is no shortage of killing in it but it's no where near the level of a Doom or something like that. It has to be the most addictive video game I've ever played. They've got a sequel now too where you can team up and play with/against people on-line, Socom II: U.S. Navy SEALs. It's definitely worth renting one of them to give it a try.

I'll also throw in a plug for NHL 2004 because hockey is the greatest sport on the planet.

"Chickens don't clap."