Was watching Pearl Harbor recently (Girlfriend really wanted to watch it again) and this exact discussion came up. Without hesitation, I would have volunteered for a spot in an Eagle squadron, and kept flying whatever I was told to fly. (This got a sharp smack from my girl, who doesn't even want me going into the military now, but has accepted that she doesn't have a choice in that matter).
I will admit, in my own self interest, I would do EVERYTHING in my power to assure I NEVER get stationed fighting against the Japanese. From the reading I have done, being a POW in Germany was rough, but generally survivable and humane. Japan on the otherhand... The whole lot of them should have been slaughtered for what they did, but that's a different discussion for a different thread.