I thought it would be interesting to have a thread where we all discuss what we think the optimal early tech order is and the reasons why. I usually go with chemistry -> pioneering -> planetary survey / ecology. The order of the last two changes based on the map and alien placement. Chemistry because both the recycler and lab make a big difference early on, and pioneering because we all know how important trade routes are. Planetary survey is a boon for your explorers trying to clear the map for trade routes. Ultrasonic fence has one of the best quests in the game as well and since when you get the quest is luck based it's best to get the building up before you need the quest. What tech orders do you guys favor?