I've still only used terran, though I will vs. a computer to check out unit timings to compare against a build order i'm thinking of. It would be nice to have practice partners, but this whole no chat room system is really dumb.
Going to catch up on sleep after typing this up so I'm more refreshed tomorrow and hopefully my disconnection rate is kept to a minimum. The game is still tons of fun, and having a good basic grasp on the units allows for a much wider window of opportunity.
I might switch to zerg relatively soon, but i'm not sure, because there's still so much about terran that i don't know and they are such a fun race. About to fall asleep on the keyboard so until tomorrow, g'night.
Feel free to ask questions, but take note that i only have experience as terran.