I like playing as droids. I think the Super Battle Droid is one of the best units in the game. It's gun shoots super rapid, and grenade laucher is great for when you need a quick kill. It's main problem is that there isn't a back-up to the main gun or the grenade laucher.
The droids aren't nearly as agile or acurate as the Clones. But that's the way it should be. They are an army of Jango Fetts, y'know!