I can't stand playing as a heavy because he is too freakin' slow. There are days when I can't stand playing as a soldier either...sometimes it is nice to have the mobility of a Scout or a Pyro.
Heavys are good for rushing capture points, and they make a decent mobile defense when defending capture points. Of course, a Heavy without a Medic is mostly useless.
of course...i never play as a Heavy so maybe I underestimate the value of the class...I just know that I've beat down my fair share of fatties with the baseball bat.
