Generally what the others say. . .
And seemingly too- a lot from where others are from too- east of the big smoke.
I worked for quite a few years as a motorcycle instructor, through uni and further ed, as it paid better than the cycle shop.
Always go protected, and even on a "smaller bike", you'll still do a 13.5 secon standing quater, and thats as fast as a Ferrari Testarossa. 0-60 becomes a bit irrelivent with bikes as they're all "less than 4", and launch and timing accuracy can make a big difference.
It can be addictive- fo me culiminating in becomeing a tuned Hayabusa owner (I also worked in a rece engine development shop- didn't pay better than being an instructor. .), and sitting on the UK busas forum for a while.
Now I just ride and thrash a GSX-R750, purely for pleasure, as I work close enough to home that cycle commuting is in again.
It has a good social scene, and like bicycles, everyone is friendly, and much more friendly, caring and safety concious than the image woudl suggest. If you're out there doing it, you'll be very well recieved.