Most people whom have tried to come over on me were apologetic if we stopped at a light as I am quick on the horn with a beep beep beep to get their attention as I am making an evasive dive for the farthest I can get over in my lane. I won't cross the line if there is a lane beside me to the right or left in an emergency as Tucson drivers are notorious for blasting past 15-20 mph faster setimes and I feel it is safer to get a bump and wreck that pull into the path of a faster car and you never have time to do much more than your preplanned, even checking your mirrors in a roving pattern you still have people using traffic as cover for their speeding and whip into an open lane late so you never see them coming.
So, size matters on a scooter for safety reasons too.
Mileage is good, but for me, safety is a factor. I will trade 5-10mpg for the powered to help me squirt ahead if there is room if braking out of the situation is not a safer choice. Traffic doesn't respect bikers space some times. Worst offender I had was a Mercedes SUV. If I had something in my jacket pocket I could have dropped into his grill or windshield that day he would have deserved it but that likely would have put me in the hospital. I'm seriously going to be putting front and rear dashcams or action cams on my bike just to protect myself if I get have an accident and need to prove they were at fault as everyone lies like a rug anymore.
