Zerg is my favorite. ahh, good memories of playing on that map that you can stuck the entry with....forgot the name.
edit: Big Game Hunter I think. Just stuff the entry with 1 Terran Barrack and a supply depot and nobody can come in. Then just stuff a couple Bunker over there and some Siege Tanked and you are pretty much safe until the other side develope invisibility or air planes.
Man, I missed that game, it's somewhere in the old boxes, gotta find it