choppers were fun too, i could fly them a hell of a lot better than planes but the bombers were awesome weapons. It makes sense from a team play point of view, they help break through tough defences and deny the enemy their vehicles, but from a solo play point of view they don't. if you're playing lone wolf then planes will likely ruin your day.
I love choppers and spent some time getting ok with them at some point, but again choppers are so much more vulnerable, even when you've got decent its still easy enough to dodge into a tree or hover a second too long. infantry don't feel helpless against them, they may have to find cover but they can try something whether its use a jeep MG, SAM site, RPG, whatever they can at least hit the chopper.
Planes yes they do have team aspects but the average plane player never supports attacks and at best you can only hope for some air support when you've marked a tank and they fancy a kill. They are really good at denying vehicles but to the point its game-breaking. When you're pilots are shit, or just can't get off the ground your entire team is reduced to infantry which is almost a guarenteed lose unless the enemy team is too focused on baserape