@August2
Profile pics are not as unconnected to listings as one might tend to think.
A recent survey(I didn't save the link unfortunately) showed that many guests tend to link their trust more easily to a host that seems friendly. The interviewed participants were shown different host profile pictures and asked in how far they were drawn to booking on the basis of the faces and their expressions.
Well, the survey proved that 'attractive' created more trust or willingness to trust, but then 'attractive' expands psychologically to a friendly-looking face with a genuine smile.
Whether that is all a real influencial matter or not aside, I actually had a similar thought as @C-C0 when I saw your profile.
Shower future guests with personal sunshine on your listing page and I'm sure the bookings will flow even faster!
I often get bookings with profile pics of posed and unsmiling, sometimes almost dramatic selfies while the guest turns out to be a much more charming and natural type of person. A shame actually, since their real self would create much more automatic trust and less feeling that they might be high-maintenance.