Clutch, throttle, break, center of gravity, wet pavement, momentum, distracted/careless drivers, etc., and so forth.
First of all it's
brake. Second, putting a bike in gear is much easier than a car clutch. There's no stalling or lunging, and the shifter's sequential. Just twist the throttle and it goes. Center of gravity is a non-issue; when you're stopped, just have a foot out.
I'd ride in the dry only. But if you encounter wet pavement, just go over it straight. I'm not sure what the momentum issue would be; the bike will stop pretty quickly. Just don't hit the brakes while turning, and don't use just front brake if you're stopping from highway speed. These are all things that are second nature pretty quickly.
I've learned 2 life lessons from riding a bike, that also apply to being a safer driver in a car too:
- The speed you're going doesn't matter; it's all about visibility down the road. The first time I wiped-out, I was on a back road going at a reasonable speed. But then I encountered a turn that was much tighter than I was prepared for, which also had sand on it. I learned that whenever you can't see a good distance down the road, you have to slow down, because something may come up that you're not prepared for. And it's helped me to not hit a deer or turkey with my car too.
- When you take the motorcycle rider's course, you learn the acronym SIPDE - Search, Identify, Predict, Decide, Execute. For example, if I'm on the highway, I'd try to avoid being next to another vehicle. But if I am, I need to have an escape plan, in case the guy moves into me. The escape plan may involve moving into an adjacent clear lane, or backing off if no one is behind. If I can't make a safety plan, then I'll change my situation, by changing lanes or speeding up or whatever. This has helped me with my car too, as I'm often the smallest, lowest car around.
The appeal of a bike is that for very little money, you can ride something that is quicker and more nimble than any exotic sports car. And without being an asshole who weaves through traffic, you can still move around much more easily than in a car. And you get the full al-fresco experience; the sound, the air, the smells. But like I said, the world got too crazy for me. That's why I stick to convertibles.