For me, the reason I like MBs is that they are like a bicycle.
It may become pertinent to upgrade to a MC should one begin expecting too much from a motor assisted bicycle IE: need more speed, performance, need to commute a long distance at various times of the day and do it with relative safely, etc.
Also, not talked about much but more than one might guess, a lot of interest in MBs is generated by people who don't have a drivers license.