Actually playing Gothic 3 a bit at the moment thanks to the $2 sale at steam. It's a shame it released so poorly, as it isn't a bad game (with patches etc).
I'm pleasantly surprised by the size of the world so far, and the draw distances too. You can see landmarks at quite a distance, which is a great help in orientation. There is a lot of exploring to do and things to find, the voice acting is fine, graphics aren't dated and it's nice to see an RPG where half the doors aren't just a texture on the wall, never to be opened. I've yet to find a building I can't go into. Granted, this is early on, but it's a good sign.
Not that it is bugless; AI path-finding is a poorly done, with my companion getting caught on a number or trivial things. Orcs that I had knocked out and robbed earlier don't seem to remember the fact after a few minutes. But so far I haven't found anything game-breaking, and nothing terribly distracting.
All-in-all, this could have been a popular game if they hadn't released it before it was finished.
If you are on the fence and want to try something that isn't burdened by all the negative attention, try Risen, it's essentially Gothic 4. (Not that I blame them for dropping the Gothic name!)