Yeah, I haven't learned to play the Zerg that well, I don't know why. I'll usually start out with a small Zergling rush to the enemy base, if that fails I'll create Hydralisks, Lurkers, and Guardians and then have an all-out assault (which usually fails o.o').
But Personally I'm just good with the Protoss, I love their units (the shielding and all that). Probably because of their power, and I'm pretty good when it comes to collecting resources so the expensive soliders don't really bother me.
The Terran on the other hand was the first race I played as, and I've come to respect them. They've got some decent units and are very easy to play, on the other hand some of they're units are weak, and die easily leaving you staring at your computer saying: "Why the hell did I do that?". They do have Ghosts, and if you can destroy the enemy detectors, they really do take names (NUKES
So there you have it!