In Air Warrior, while I was new, I learned in a Spitfire. Once I came here to AH (after a several-year hiatus from on-line flying), I got back in a SpitV (mostly -- some in an F4U and some in an FM2) until I got up to speed again.
Now, I fly whatever I will be flying in the next scenario and, outside of scenario practice times, generally fly P-38's, F4U's, or P-47's. I mix it up from time to time, but I usually stay out of the more-popular planes just for variety's sake.