I rode an R1 3 days after passing my test and a hayabusa the following month and I'm pretty certain I survived, why? Because I respected the bike and didnt just expect to jump on and ride like foggy. My 1st bike after passing my test was a Kawasaki z750 (I'd never owned a bike before taking my test) and 2nd bike was a zzr1100, I used my brain, didn't ride like a loon (not a complete loon anyway) and all was good in the world as I learned to ride a powerful bike.

All that said Iv owned a lot of bikes (ALOT) and having riden both 1000cc+ and 600cc I have to say the 6s in general were more fun bikes to ride as you had to really ride them whereas with the liters you just open the throttle and everything gets blurry and fast.

What I think I'm saying in a long winded and protacted way is don't expect to have more fun just because your on a litre bike but at the same time don't be worried about riding one as long as you don't ride faster than your current skill set.

Rule number 1: Your right hand controls the speed NOT the bike.