I personally have mixed feelings about modding. It can be a great deal of fun, but it also feels almost sacreligious when modding a truly awesome game.
Too bad, though! I shant let my scruples intrude upon my enjoyment! I, personally, want to see a Geonosian warrior added to the Separatists and some sort of Kaminoan for the Republic. (I know, it's hard to imagine a Kaminoan fighting... But it would be cool if done well, no?) I don't know what I'd add to the rebels or imperials. Heh...