I started playing a week ago or something and I really love the atmosphere, the not-tedious building, the inventory that doesn't have me come back to base every few minutes, graphics are beautiful and fighting gives me enough options to feel rewarding and meaningful.
I got to admit though that I am coming because I'm frustrated about something, so here comes the negatives:
I hate the stamina system with a passion. I feel like my character is a kid dropping from exhaustion after running a few steps, and the food-buff system doesn't really mitigate that problem for me.
I recently went into the Black Forest because now I need copper and other stuff to advance and the enemy spawns _plus_ stamina trouble makes it very frustrating for me to anywhere when not running away. When mining for a few seconds whooosh, 3 Greydwarves... then a shaman and a brute and a troll... My pick cracks up the surface, I fall into the hole, fend off two dwarves, can't come out because no stamina and the hole is too steep. I die. Gravestone with my stuff inside the hole...
I go back to retrieve my stuff, followed by an army of Grey dwarves and boars, get to the place, pull and kite away the troll and my growing fan club who want my skin, get my gravestone and... CAN'T PICK UP MY STUFF BECAUSE I GOT _ONE_ THING IN MY INVENTORY WHICH PREVENTS ME TO USE THE TAKE-ALL OPTION.
So yeah. That frustrated me greatly, as far as games can do that.
I later retrieved my stuff via Godmode where I was CC-locked and pushed around a lot before I succeeded.

Summary: I'd like to have more stamina that drains a lot slower. I think the spawns in the Black Forest area are far to excessive and no fun at all.
I love the rest of the game. It's awesome!