I like the sound of tires squealing on tarmac after a long, hard mission.  Its even better if my Mossie, Lanc or Fort is shot to hell.  The slow slide of a crippled aircraft sliding down the runway on its belly after barely managing to return is almost as good.
However, I also like to dive into superior numbers of enemies, do Rhubarb missions and other things that get me killed frequently.
I'm also, frankly, not that good.  Average at best.