Oblivion is a masterful game and pushes the limits of gaming graphics and intelligence to the extreme. The story line is entertaining and fills the player with emotion while the game as promised has over 200 hours of gameplay and plenty of nonlinear missions to undertake. Whether on the xbox 360 or the pc oblivion which immerses you in cyrodil a lone province in the huge continent of nirn. Graphics are amazing and controls are easy to pick up on. The rag doll mechanic is well used. (bodies are actually affected by spells and strikes.) Oblivion is well worth the wait however morrowind had its plus's.
Morrowind had enemies that actually flew above the treetops (there were no trees on vvardenfell however) and morrowind had many more guilds and factions to join as well as its expansions.
Oblivion is in its own class however if you do like this game or are a fan of massive rpgs with great feel oblivion and its predecessor morrowind are great investments.