I might have voted for Endor except that I have yet to really play it since the patch and before hand had too many CTD's to bother. At this time I have voted for Escape from Hoth. For one, I admit to being a space battle junkie becoming hooked on Xwing and Tie Fighter (years and years go - I feel old), and Descent Free Space (awesome game!!).
I love the mix of capitol ships, fighters, and bombers, as well as objectives. The challenge of getting three transports to the hyper space point is a blast, literally!
The scenes witnessed when you're flying around teh map seeing laser fire all over the place, capitol ships going at, transports trynig to sneak through, fighters chasing each other around, it's all frickin fun. Seeing how well teamwork applies to this map is also a biggie. Nothing like requesting support and having 2-3 fighters and a corvette respond immediately is pretty darned cool. Warm fuzzies kinda deal. 