[DUCKVILLELOL]

As Yang said, that initial probe scout is pretty huge. If you're doing nex first keep that scout alive in a corner of a nearby base (like you would against a zerg) then head back in to test the water at some point, and you don't see gas prepare for a world of pain.

A big thing some people do - which to me is incorrect - is using chrono on warp gate tech. If you're doing nex first you need to 'catch up' on where you would normally be on a military front. Chrono'ing out the first couple of stalkers (or zealots, depending on how you're doing the build) is the best way to do that.

Made a lengthy post about nexus first on reddit a little while ago with more ranting/raving about nex first if you get bored and want to read http://www.reddit.com/r/starcraft_st..._first/c3j3tve, additionally here's a nexus first into colo drop like a boss http://drop.sc/96247

The best person to watch Nex first is Axslav, that kid smashes it up regardless of what his opponent does.