i dont know bout you but i use alot of strategy in hl2dm, i always go to get health, i know where the weapons are, and i always drop some grenades in the spawning areas. theres alot of chaos but theres some strategy underneath it all.
BESIDES manipulator because that would be everyones favorite
my favorite is the magnum. man that gun pwns, when you shoot them in the head they do a backflip. awesome! and its all shiny