I've always liked the part of realistic games where you can't see your opponent. I never liked the fact that you lose half your health on a jump and you don't get jets.
A mod should be made that combines the best of of realistic with regular playing. Basically, adding a new feature to regular mode of CTF or INF (all other features stay the same)
-Can't see players not in your line of sight
If this is already a mod, sorry for the useless post.