125cc are almost always a thriller, there's usually fight until the last corner of the last lap which is always fun.
250cc this year have been really great, coz last year it was a stroll down the park for Dani but this year Stoner and Lorenzo are making him sweat. And many others are also capable of winning Aoyama, Porto, De Puniet, De Angelis.
MotoGP has the big names, but not always the best racing.