I'm trying to make a new character, and this time actually pay attention to my kdr, but it just doesn't work for me. I always just end up with a kdr of about 1.0, which is just frustrating and boring to play like this. Medic: Useless, even for certs, since there are mostly already more than enough medics. Heavy: Can be pretty good, but is too dangerous to play since you are always right in the middle of chaos. Infiltrator: Can be good too, but I always get sniped by other Infiltrators when sniping. LA: Useless, except you can cert it for explosives. Engineer: mana Turret can be quite good, but I also just die too pften there. I think the best way to play without certs is using a Lightning, but even there you often have no chance to survive.