i've only tried 3d tanks, it's a cool game, i especially liked the tank A.I. I'd suggest:
- using a 3rd person view instead of birdseye.
- focusing on just 1 player.
- making arena's where you can duke it out, so after choosing your tank, you choose your arena.
basically, just spend more time beefing up stuff and it's be great

i'll try the others.
dunno about the rest but i'd prefer it if it was 3rd person intead of birds eye. for some reason i think if you spend
your birth was a blessing, sent to live and die on earth as a lesson, we each have a star all you have to do is find it, once you do, everyone who sees it will be blinded - DMX