Although I haven't really had a chance to play with the 1337 or the 1337 in DoD, I do pretty well in most games. I'm usually top or at least in the top 5 (of both teams)
My best weapons really vary, it depends on the map and the other team. I can play any weapon fairly well. I can sometimes kick butt with an mg 42 beleive it or not. Not necessarily deployed all the time, but deploy, move up, deploy...
I started playing DoD when I got broadband about 2 weeks ago and while I took a while to adjust to its game style and rather shitty recoil system it turned out to be rather satisfying if not incredibly frustrating at times. Either from a Grenade you never knew was there as they make bugger all sound or from a sniper 10 miles away, in a dark window with a tree infront of it. Die, spawn, run all the way back, die, repeat.
But when it is actually fun I usually play as a Grenadier for Axis. The Kar owns everything. And Riflemen / Master Sergeant as Allies. I only tend to play Avalanche and a few others, though.