Giving up on Starcraft II?
You terrans always run at the first sign of trouble...
Yeah, I'm bad at guessing what the enemy will attack with.And as the identifier says, I'm lazy.
You aren't supposed to guess, you're supposed to scout. Send half a dozen marines over to check out the enemy base, see what he's building. If they die, who cares, they did their job by letting you see what the enemy was up to.