Sweat: maybe it's just me, I don't know, I didn't ask other people; maybe other people don't sweat as much, or maybe they don't mind. It's hard to tell, though, because I never meet people using bikes at my clients' offices.

And I don't see many people on bikes wearing suits; whereas in the subway there are many people with suits (i.e., "suits" aren't allergic to public transport).

A thing about Paris that I find is less true with other big cities is we're always in a hurry, and always late, because we always think we'll be able to make it. On a motorbike, this results in fines (and sometimes, accidents); on a bike, the ordinary outcome is arriving out of breath and, yes, sweaty (and late).