Personally, I like to make little battle groups that vary from group to group, and have one of the strongest ship so that it's like the rest are it's escorts. My favorite is a Republic II Class escorted by two dreadnaughts, four CR-95's and sometimes a carrier or two of some sort of light cruiser.
Everybody play with maxed out units? Only I find TIE Fighters & TIE Bombers that cool? (roleplaying reasons of course)
And sometimes I make little fighter ony units when I want to really be the Rebellion, throwing in the occasional Nebulon-B or CR series ship. Then I throw in the occasional Mon Cal ship, but only to guard major planets.