One gripe: people who res as soon as they die. I'll be 3m away from a corpse so I run over to it and the guy ****** revives. On the flip side, people who pick medic and then stand on top of your corpse but don't revive. Idiots.
Yesterday, I had two medics within 10 metres of me, one actually ran straight over my still twitching corpse.
Most medics don't revive, hence people respawning immediately.