There aren't a lot of things that bother me in came, yes there are those moments when I call BS on something, but that usually passes in about 5 minutes or so.
There are only two things that actually bug me in game:
1) Shooting planes that are landing. This is a sign that you clearly have no skill to engage an enemy in a fight so you resort to killing him while he is at his most vulnerable. I will shoot at a landing plane only under certain circumstances. The most profound being a non-perked buff landing, I will often shoot the drones but leave the lead aircraft. All of the other situations are circumstantial so I'm not going to bother covering them.
Also, I consider vulching a viable tactic so it is not included.
2) This bugs me more than number 1, but happens less often. Towering in a perked tank at the first sign of danger. If you come out in a perked tank for a battle, don't sit on the pavement and tower as soon as I turret you, or as soon as you hear a bomb coming in. YOU knew the risks when you chose to drive your tank out, you should face the consequence of your actions.
If I had my way, number two would be fixed by implementing a better combat system for tanks.
a) A tower time limit. hitting End Sortie or .ef will cause a 5 second delay before you are actually towered.
b) If an enemy tank shoots you, he has engaged you. You MUST kill him (or have someone else kill him) in order to tower. If you tower while he is still alive, it counts as a death even if you are stopped on tarmac and the kill is given to the enemy who engaged you (if multiples engaged then it falls back to the default system).
