First and foremost a very good reason to ride and not drive is the pure exhilaration of the wind in your face; that feeling of freedom as you ride down the highway passing all the cars and trucks as you safely manoevre your way in and out of the traffic. That is the second reason to ride and not drive; the ease with which you can overtake a huge semitrailer that you simply cannot do in your Toyota Landcruiser or even your little Suzuki Swift. You must still obey the road rules and look out for any danger as you would in a car but a motorbike is a pleasure to manoevre on 2 wheels instead of 4.
Thirdly are the economic reasons to ride and not drive. It is simpy cheaper to own and run a motorbike than a motorcar. Less fuel to pay for and more economy in running it. Fourth reason is very shallow and vain: with a little bit of planning you can look pretty good riding down the highway in your leather gear all shiny and matching the colour of your motorbike. Even the boys care what they ride and wash their bikes regularly so they always look good to anyone observing them; and that is usually everyone when a motorbike is involved.
The fifth reason is linked to the fourth; how else could you dare to wear your choice of leather without the general population thinking you are a bit weird. When you ride a motorbike it is almost mandatory that you wear leather if you wish to keep your skin intact in the awful event that you should fall off the bike. So what a wonderful excuse to go out and finally buy your leather coat and pants and know that by doing so you are giving yourself the best chance of minimal skin tears should you fall off and you will always look great as you ride along.