Ok, no spoilers here at all, just some of the choices and fun things I have experienced thus far. Character creation was lots of fun, making my dwarf with his super moustache with the intent to be a Tempest Dwarf get-into-the-thick-of-things and lead-from-the'front kind of hero. I tried quite a bunch of looks for myself trying to match the voices provided as well - which was already awesome!
characters which we interact with as part of the game, some can join your adventures directly others you talk to often. All these characters are interesting in some way, representing a viewpoint in the world, contrasting in their perspective or offering a new set of quests etc. Then there is the main story itself, this is a game where we are the protagonist in a big sweeping story and that is a fun thing to be an active participant in.
I will just mention a few other things before winding up this up. I find it awkward (not using a controller) that I have to run everywhere, this makes me look a bit loony in small rooms racing up to talk to people. There are plenty of elements out in the wilderness (maybe because of shared assets) that look as though the game wants me to find a way up a particular mountain but I just cant get up there! The problem of wondering if any of the main NPCs have new dialog choices means running around to them all lots of the time and basically having a tiny meaningless conversation with each of them regularly.
ps. the horse riding is wonderful!!