The mentioned ankle protection is another thing to consider. The heavy leather hightop work boots will do well for protection against sliding on pavement or small impacts, like from rocks and such, but won't protect from more substantial impact as in a crash. My TM boots have some ankle armour for that.
Boots, like everything else with a motorcycle, are a matter of personal preference and everyone will tell you their own opinion about what is best. This is mine.
Oh- and mc boots usually have a reinforcement patch over the left toe to aid in wear from the shifter.