The let's plays uniformly do not appear to be building nearly enough survey ships. This is my game plan for first play:
Restless Ents. Fungoid, Slow Breeder/venerable/sedentary(restless for Ents, still not that fond of moving.). Xenophile/materialist/pacifist. Moral democracy. wormholes, nuclear missiles. Plan of battle: Build more science ships. Not just one more science ship. *lots* of science ships. it is time to aim for the leadercap (minus one slot to permit hiring an admiral, I guess) If possible, I'm going to strip the science bureau naked of staff. You thought you were going to manage a research program? HAH! you are a starship captain now! Into the black you go! If possible, rotate one back to the capital before drawing new cards, I guess. Not entirely sure how this works because none of the streams so much as bothered to promote level five surveyors into the top job >,<
Split the starting war fleet, bounce them into systems ahead of the science ships to check for local hostiles. Survey the heck out of everything. When out of planets in wormhole range.. plop down more wormhole gates, survey on! The idea is to snipe as many anomalies as I possibly can while running from everything that might shoot at me. While doing this.. because while this is a lot of micro, it shouldn't be that much of a resource commitment, peaceful expansion strategy. Only with one caveat - not going to do any "contact alien" projects for aliens that are obviously other civilizations, because given the maximally aggressive survey strategy outlined, if I did that, I'll never get any society research done at all. They can work out how to speak ent if they want to talk.
Other commitments : No wars of aggression. Build a federation Asap. Uplift and enlighten *everything* I come across that can be uplifted or enlightened. Possibly integrate the vassals gotten from enlightening. Not sure about that yet. No settling anything that isn't a continental world with ents. Pay zero attention to continuity of borders as long as it's in wormhole range.
Gamy things I am totally going to do: Once the observation projects for the various wildlife is done, go and kill clouds, amoebae, drones and crystal entities until the related research auto-complete. Given the survey corps insanity, I should have a sufficiency of targets. Don't research any other weapon projects *at all* in the early game.