I really like this write-up, I would definitely use it in my games! I have only a few thoughts to consider:
With Quadruped: Hooves, I might add +5 movement also, just to give it a little buff. In most of the games I've played, terrain/caltrop-damage is fairly rare, at least comparatively to being knocked-prone (paws) or climbing situations (tarsi). Also it seems like centaurs should have an option somewhere to gallop a little faster.
Sure, I can see that. My table happens to like
spike growth so that sort of damage is pretty common where I am, but I can see combining them.
With Unending Strength, since Relentless Endurance is already an orc gift, what about something like:
Tireless Workhorse (OK, cheesy name...): If you fail a Strength ability check or saving throw, you may reroll it with Advantage but must accept the new result. You can't use this feature again until you finish a long rest.
Heh. I like. Nothing wrong with the occasional cheese.
I also wonder, with Carouser, if that theme might work better in a Culture.
What do you think?
I suppose it depends on how a party culture is done. I'm... very much
not a partier by nature, so my two different thoughts on that would be, (1) is there enough of a party
culture of the sort you can be born into and live your whole life; and (2) Maenads? Some sort of (potentially) fey-based culture? I could
definitely see that. There's a whole world of potential cultures for the Fey Realms and the other planes of existence.
I'm going to keep the Carouser as a gift, although I'm rephrasing it a bit, but I'm also going to try a "Wild One" culture.
Carouser
Centaurs, particularly those of fey origins, have a reputation as party-goers; in some cases, it’s true. Your ancestors were blessed to be in the retinue of gods of joy, dance, and alcohol, and you have inherited some of that blessing.
Crowd-Pleasers. When in a tavern or other festive environment, you gain an expertise die in Performance and Persuasion.
Iron Liver. You have advantage on saving throws against poison, and you have resistance against poison damage.
Life Of The Party. You have a natural affinity for alcohol. You are proficient in Brewer’s Supplies.
Playing For The Crowd. You gain an expertise die in a musical instrument or gaming set of your choice.