They are all great, but Encounter at Mos Entha has a great feel, a mix of long and short ranged fighting, night battles, rapid pace, contance action, night battles, brillient for squad play, the fights are often very concentrated, general kickassness, good back story, different hights, great for all classes except vehical based ones. And don't and vehical to it it would not work at all.
Obvioly, Hoth ground, and crashed ISD, and a obiting space ship battles would be great