Too many variables for a right and wrong Paul.
For me, being located in a village, trading under my own name has been of great benefit (local, reliable tradesman). In other locations, a business name may have been of better for me.
A business name may give the consumer a perception of a larger efficient company with the ability to clean anythink from a small lounge to a corporate head quaters. Could also give the impression of being cold and impersonal and would treat any customer as a "number".
Your own name could provide the exact opposite of the above. What's just as important as a name is the way it's presented and marketed.
Safe and happy cleaning:)
Ken