I know exactly how I want to fly. I want to be constantly surrounded by red planes. Unfortunately green planes tend to get in the way. I have so much fun when the friendlies finally give up defending a base and the red horde rolls in. I do have fun doing silly things every now and then too like Storch raids and upping King Tigers at camped spawns, but the most exciting bit of fun I have is when I'm flying out numbered 3-4-or 5 to 1 dodging shots every second, trying to land shots on the reversals, and learning something new to improve my flying.
Currently the only way for me to be constantly surrounded by red planes is to switch sides to whatever country is being beaten up on and hope not too many of the friendlies on that country join the fight. Unfortunately for me the 12 hour rule denies me this fun every single day. If I can fly countryless then everything in the skies will be red and trying to kill me. I'm not saying that I don't like friendlies because they ruin my fights, but that I just don't find even fights very fun anymore. I don't learn anything new from them anymore. Maybe it's just the way I think, but I love testing my limits and then seeing how far I can push them and improve and reach a new level. Then I push that limit and reach another level. I guess maybe in Aces High I've reached the level where I want to see how many planes I can fight and beat at once. The only way to learn how to win a 3v1 is to fight them and learn how too. If I win a fight just because a friendly showed up and helped me out then I would have rather died.
If I can't fly countryless then I pray HTC changes the 12 hour rule so I (and many others who hate it) aren't stuck flying with the horde attacking virtually undefended bases instead of against them. If there are 30 Rooks attacking a Knight base that has maybe 5 defenders I don't want to be the 31st Rook there fighting 10 other friendlies other 1 enemy, I want to be the 6th Knight defender fighting the 10 Rooks fighting over the kill on me.
Nothing could be easyer to achieve. Just attack an enemy field which is under attack by the third side already. They'll fight eachothers and everyone will be red to you but with the added bonus that youre confusing everyone by mixing in. Its a perfect chance to pick both sides fighting eachothers in a sea of red. Of course if you fly bish then there really may be no place to hide from the swarm of hordelings.
The only problem with that is on almost all maps that fight is about an hours flight away. I do not wish to fly that long for one fight. I don't like having my climb out time to the fight 5 times longer than actual fight time.

I'd go play Microsoft Flight Simulator if I just wanted to fly around looking at the scenery.