After playing Skyrim I decided to pick up Oblivion. And, I think, objectively speaking it is a pretty awful game. I get that its a sand box, but honestly i dont see why that is supposed to make it good. I think Bethesda get an unfair reputation as the best the genre has to offer. Their only game i have really really enjoyed was Skyrim. Fallout 3 was totally awful. In fact, i have not really enjoyed fallout since fallout 2. A good sandbox game IMO is Grand theft Auto. Its not a true sandbox, in the sense that you can see all characters all the time. But it is infinitely more believable than the cardboard characters and poor story lines that Bethesda churn out year on year. The only reason i think their reputation is so high is because modders basically fix most of their nonsense and thus improve the game and give it lasting appeal. Oblivion looks passable if you can be bothered to spend 4 hours trying to mod it.