No need for justification here, curiousity strikes as to the reason behind peoples choice to ride and I think it's a lot more than a mode of transportation.
Naturally I'll start off: The reason I am interested in riding is of many, I've always just liked bikes in general, more so cruisers as I loved the deep rumble and the whole image the stereotypical bikers had. But I also believe it will be one hell of a thrill in general, the fascination with the sport bikes is they are very sleek looking, they appear to be quite fast (compared to sport cars) and quick off the line plus they are agile and require skill to corner with.. straight line is boring all the time. This definitely feels more like a culture than a sport or even a hobby, though it can be any or all of the above for each individual. So in all, I'm very intrigued to start riding and feel the thrill these bikes give and as well try something new and start a new challenge that is the skill of handling these agile machines.
Hopefully that wasn't too squidish.