Headshot wars is an easy #1 cause it gives me practice with the deagle. I think TDM is the most boring, it'd be better if the teams spawned together. Being the one green dude in a sea of red/blue is the worst.
I'm neutral on this opinion, it's annoying because no one is helping me, but it's fun because you don't know if your gonna get ambushed and the chance you might kill the ambushers, imo the best round for TDm are mc_motel and mc_nuketown
