I only seem to read negative experiences on the forum re hosting guests who are hosts themselves, so I thought I'd share my experience.
I recently hosted 4 guests in a row who were also hosts, which was a strange thing, as they are the first ones I've had in 3 years of hosting. I was a bit nervous, as I've read how much other hosts have said they dread these bookings.
All of them were lovely guests- no complaining, no unsolicited advice, expressed lots of appreciation, left their space clean and tidy, and left nice, 5* reviews.
Perhaps it helped that all were home-share hosts like me, but whatever the reason, I now will no longer worry when I see a booking request from another host.