Hrm, in game planes?
Fighter, I'd have to say P-38. No doubt Kelly Johnson had a real knack for combining form
and function. I think the fact that 3 of his 4 most famous aricraft designs have been shown in this thread (P-38, F104, SR-71 & U-2) attests to that.
Med Bomber? that's a tough one, can I say mosquito? love that plane.
Heavy, B-17 no question.
Best plane of the 60's F-105 Superchief. With the 104 being a close second.
I've always liked the look of the F-15, I could be a bit biased there, because we were stationed at Luke AFB when the Eagle's were first coming into operational duty....my borthers and I would bike as close to the runway as we were allowed, and sit there with our cameras. About 1 in 3 takeoffs would be a max performance climb out....sweet.

I dunno, if it flies, I love it.
Cheers,
Spitter
It's good to make friends, even if you have to shoot them out of the sky sometimes.