IMO the "coolest" and "scooter" have no business being mention in the same sentenance.........ever!!
Scooters can be pretty cool. A friend of mine has a 150cc xingling generic scooter and whenever I see him around campus, he lets me borrow it for a ride around campus and the surrounding neighborhoods. I LOVE it! It is so much fun...it shows that you don't need +100HP and triple digit speeds to have fun on 2 wheels.
Another friend also has the same generic xingling 150cc scooter, and I have ridden it in the super crowded streets of downtown Caracas, and it is so much fun being able to zip around traffic.
I just love how agile they are, the storage space they have and how practical they are for riding around the city. They are not meant for the highways or roads. Riding them in the streets of a city is very, very fun...
Oh, and scooters + kart track = Epic win!!!!