If I remember correctly you could choose servers that would reduce the game maps and wouldn't include the jets. Also there are maps that don't even have choppers or Jets in BF2. This is something I really enjoyed about BF2, somedays I like pushing up with an infantry unit and others like taking them out with my uber plane bombing runs, and sometimes I just liked stapping a some C4 to the front of a vehical and driving it into the enemy. BF2 had like a million little games all packed into one IMO. There was never a dull moment.
As for prone I have nothing against prone, some people like to sit where they are, and thats a good thing because you know I will be right back to kill that proning behind lol. Plus prone can be used to take cover from enemy vehicals and gunfire.