i just shoot at the enemy, doesnt matter if he is on the ground, in the air, at sea, whatever. the enemy must die.
on the other hand, it does make you feel good when coming to a quiet base and seeing one single upper if you let him take off. honour and all that jingo. what is even better feeling is when you shoot him down, and he is mad so he ups again. and again
and again. he tries so hard to kill you but cannot as you have every advantage.
if you vulched him first time he might try another field. its always good to let some guy get a taste for the slightest chance of victory, and revenge. get more score padding kills and better pleasure than simple vulching.
on the other hand, theres nothing more enjoyable than seeing a formation of buffs taking off from a capped field. especially when you get all 3 in one pass

and if you should happen to stumble accross a big mission.....now thats any players headonism..