On topic of races again. Lizard people that can only wear head/wrist/feet armor due to their body shape and cloth shirts, but run faster, have decent scale armor and can use tail as a weapon in combat. Also only wisest lonely reasonably humans would attemp to speak to you, others would either flee or attack at sight, so you are forced to just fight, rob and discover worlds secrets on your own base dc on scrolls and eardropped conversations or invest in stealth and speak to people from shadows covered in a robe. Are such differences interesting enough to jusify a separate race? Im not suggesting there should be such an alien race, just theoretically, purely for discussion.
P.S.: rasism could be interesting feature, if say a land you explore was always at war with southern empire choosing bkack skin would have people attack you unless you cover everything in armor and hide behind a helmet and choosing somewhere in between would make people treat you with no respect as a half breed. Then again there are too many people out there who would take this chance to rant about a racist game and review it with hatred. At least pale skin could make some simple people avoid you as you look unhealthy and could spread diseases.