Fadaar
That guy
Just theorycrafting, sure - but I would imagine that if things start to vary too wildly from what's defined as a human habitable zone, then what type of alien life forms you encounter are going to be wildly different than what resembles a human. If they breathe another type of gas, then thought has to be put into what type of energy they are living off of. If the energy they are expending is in such low amounts or even super high amounts, then the form of communication they are using is likely not even close to what we would understand w/o some type of help. At least that's the way I interpret what I've read.
What Ive always been slightly annoyed with is how little effort goes into different species/aliens in media. What I mean is, even though movies/series shy away from slithering and anything other than bipedal for likely cost versus reward - games do too, and games often have the same animations available in NPC's.
They had aliens that required a different environment in KOTOR. Can't remember if it was 1 or 2, think it was 2, but they had a cantina that you as the player character had to wear a full suit to enter/survive because it was their ecosystem inside.