When I played WaW, I had a class with the Pump shotty, and a class with the Double Barreled. The pump actually had a bayonet on it so that if I missed the shot I could impale people. Also like the SMG's. In more modern day games, use Assault Rifles a little more (as everyone else seems to) though I enjoy SMG's and shotty's more. TF2 is entirely different, though I do enjoy getting up close and personal at times.
It shouldn't matter how you get the kill. Everyone just wants that number to go up by 1 each time they shoot an enemy, and not the death column. Sniper, assault, knife, grenade, a kill is a kill