From what I've seen so far, I think I prefer to stick with good ol' SWBFII. Running a few mods on it, and having loads of fun. The Hoth map might be my favourite, because of how the advantage seems to swing back and forth as the battle progresses. At the start, the rebels have all the defensive positions, turrets, ammo droids and the like, and they can comfortably pick off the Empire troops as they move across the wide open landscape. Then the AT-ATs show up, and everything turns sour. Turrets blow up, spawn points are overrun, everything out in the open is mowed down as the AT-ATs destroy anything in their path (while also acting as moving spawn points), pushing the rebels back. It takes effort to destroy the AT-ATs and turn the situation back to your advantage.
Or you could just use the hero characters and wreak absolute havoc.
Space battles are fun too, if a little repetitive. It's fun to dogfight for a while, but eventually you fall back to the more reliable tactic of infiltrating the enemy ship or going on bombing runs to win the battle faster.