MotoGP has many different options, and not all are superficial. Amongst them are an Arcade, Quick Race, Grand Prix, Time Trial, Multiplayer, and Training mode. In the Arcade mode, you race through a series of 10 tracks, racking up on your score in hopes to unlock special 'fun' features like wireframe, toon, and pop video modes, as well as new riders, to name only a few.
Starting a Grand Prix series will bring you to the biker creation screen, where you customize your biker from the bike to his clothes to the number on his back. Here is also where you allocate skill points between 4 riding skills. These skills can be upgraded later by completing the Training challenges. Once your biker is complete, you begin the series on the same 10 tracks that are in the Arcade mode. You can opt to qualify for a starting position or just settle for 20th place right off. The Grand Prix series also allows you to unlock special features in the game, but is far more difficult than the Arcade mode.
The Quick Race, Multiplayer and Time Trial modes take more advantage of the unlocked features than do the other modes, though they can be used on any venue. Here, though, the racing is less demanding than that of the Grand Prix or Arcade modes, and leisure can be afforded in the form of fun extras.