Yeah, I wouldn't rush Banelings unless I was just against some first timer, I saw some video of this guy like "Watch me own this newb" -QQQQQQQQQQQ- Tons of Banelings, he destroyed him so fast. Thought it was pretty funny.
I would for sure play Zerg every game. Would you explain something for me? Can two people in the game pick Zerg or, what happens? Like, is it 1v1v1 games?
They have custom maps that can be anything you imagine, and they have league matches in 1v1, 2v2, 3v3, and 4v4. When you do league matches you can pick zerg, protoss, terran, or random. When you get random expect some sort of cheese play, which is a rush that gets an easy win if it isn't countered. People pick random solely because then their opponent doesn't know what they're up against off the bat and can't prepare properly. For example terran always wall off versus zerg but not versus other terran or protoss because then the protoss or terran can just range attack the wall for free structure kills, so if they wall off against random and it isn't a zerg they are at a disadvantage, or if they don't wall off and it is a zerg they lose.