Recent discussions have got me thinking, and I sometimes think geysers in SC2 contain too little gas. Then again, you'll almost never exhaust a geyser before a mineral patch. And if you can expand properly, you can harvest a lot of gas. Yet I always seem to never have enough gas when I need it, even with 3+ bases harvesting at once. I've mentioned a few of my builds, and this may be part of my problem.
The question/discussion is simple. Is there an optimal way or ways to spend gas, and does it vary at all between races? Is there an optimum number of geysers to harvest simultaneously? Let's hear your thoughts, folks.
My thoughts are 3 bases is a solid flow, but can be insufficient in crunch time, especially if you are macroing, upgrading and researching with regularity. Furthermore, holding a 3rd expo after your main runs dry can be a pain in the hindquarters. But after a battle, I almost always feel wanting in the gas department as I rebuild my army. The exception is as Terran. I always wind up with a vault of 3-4k mins to pump marines while I wait for gas to build up enough. I get the same stored mins with Zerg and toss, but I'm less comnfortable because lings and Zealots can't hit air.
Note to mods: wasn't entirely sure if this was better in General Discussion or Strategy. Feel free to move if necessary.