Me too!
Personally, No Mercy / Blood harvest never gets old for me, I even do a lot of pick up games (though it's tough to find a good random group at some times)

This was funny, the opposing team was murdering my team (compromised of one silent retard who when boomed on, runs away from his team, an annoying 8 year old, and one normal guy)
They were rushing through confidently when I grabbed bill by the neck a split second before he was out of reach, thus the only kill of the round would be scored.