I am still not sure if getting my CBR600RR was a great idea. I love the bike dont get me wrong, been riding for about 9 months now and it still scares me every now and then. I talked to a BUNCH of people before getting it and most said if I be careful, which I am, then I should be fine.
I think it really comes down to how well you know yourself, if you have even the slightest thought that you dont think you can handle something, start off smaller and work up. Remember, being alive is far better than getting a faster bike.