Just when I want to take a break from work, Blizzard has failed me.
Patch 1.5.3 has brought much inconvenience to the Starcraft community.
It is common to open with one barrack expand without taking gas against Zerg.
The standard metagame before and after the 188.8.131.52 patch is reactor hellion after getting a quick command centre. This opening branches out to various of strategies. There was a period of time when cloaked banshee is the popular follow up. However, after the 184.108.40.206 patch, this may change.