Quote Originally Posted by Jade Dragon View Post
I also have no idea what a good time is to get a second base.
Depends on your playstyle and how easily defended your Natural is. If you can wall-off your natural instead of your main, sometimes it is more advantageous to do that from the start, particularly in macro builds where you're wanting 2 base after your Factory goes down. It also works well for gas-heavy builds.

If you are just doing M/M, here's my suggestion:

I'd drop my second right after upgrading to Orbital Comand. If that's still too early, then right after you put your Reactor on your Starport (for medivac support for your MM ball).

Also, in HotS, build your fac with a Reactor and start cranking out widow mines to hold off a rush from taking your natural BEFORE claiming it. Then lift your rax and drop your starport on it. Kind of like the Starport Shuffle for Banshee Cheese, but in reverse. Once you've got 4-6 widow mines at your natural's entrance, you drop your new Command Center, having already built up a surplus of SCV's to transfer over.