[Mark Hamilton]

I play Zerg. Quick rushes at the start to throw the otherp layers onto the defensive, then rapid expansion, followed up by hydra swarms (fully upgraded, completely unstoppable). I can keep up a horde of 200 supply worth of hydras, replacing them faster then they can kill them. If terrans attempt to turtle with siege, I mix in lings. Lurkers provide a strong d early on to hold off attacks until you've got a steady hydra machine rolling. Terrans fall the fastest, their only hope being perfectly managed infantry (stilleasiest to beat). Protoss units are too expensive to keep up. Ive stopped playing Starcraft, however, because of Warcraft 3. Oh and they horrible messed up the balance in the 1.09 patch, making it possible to rush zerg instead of the other way around.
One thing I forgot to mention. Carriers are really a newbie tactic. If you focus fire hydras you can destroy 12 carriers with 12 hydras. The only time you should win with carriers is when you catch your opponent completely by surprise. And considering how long it takes to build up a carrier fleet, that should never happen.