Well, I cant comment on the professionalism of the driver but the some of the things I hate seeing are:
1. Baseball caps on backwards (especially adults trying to look 20 years younger).
2. Pinky rings.
3. Chunky gold chains (especially if you're an ethnic with half of your chest unbuttoned in the process)
4. Pilots walking through airport terminals chewing gum and looking like a cow chewing the cud.
Just in my opinion its very unprofessional and it goes back to the old image thing but in no way can one assume anything about the relevant crews professionalism.
Image is important but you cant beat good old professionalism and common-sense.
I may be abit old fashioned and am starting to go grey but times are changing.