Allow me to introduce myself. My name is Greg and I am a 47 year old man, married to a wonderful lady. We have two boys (19 and 13) and live in North Carolina.
I'm not even a new biker yet, but I am very interested in becoming one. I've been reading A LOT in preparation for taking the plunge, and I love this web site! I plan on taking the MSF course at a local community college soon, and if I am still enthusiastic, buying my first motorcycle and enjoying the ride. I'm leaning towards a sport bike and am thinking that a used Kawasaki Ninja 500 would be a good choice, but won't really know what type of motorcycle I want until after I take the MSF course.
And what a surprise ... I have a question of you experienced folks.

I keep reading about a new rider limiting themselves to 500cc or less and understand that it's about staying under a certain HP/torque level until one gets used to riding.
My question is: WHAT if anything is so "magical" about the 500cc limit that is so universally quoted? Is this the point at which HP/torque levels more or less really start to take off? Or is it just that the line has to be drawn somewhere and 500cc seems reasonable through experience and is about at the 50/50 (hp/torque) numbers? Or does the physical weight of the motorcycle also have a lot to do with it besides the power of the engine?
Thanks in advance for any replies, ladies and gentlemen.