A perfect combination of RPG and action.
The best thing in Gothic is the complete freedom you have, especially at the first chapters. So you are as free as in Morrowind but with a much better interface and an amazing storyline.
I have played Gothic after Gothic II, which is a game I loved. So, It wasn't a surprise. However, It seems to me that there isn't much difference between them in terms of quality. Gothic is a bit shorter than the sequel and a worse technically, of course, but the gameplay experience and the story is equally exciting.
So, Gothic is a good action game and except Ocarina Of Time, the best RPG I ever played.