For over six yrs. I have rented out my condo when not in town. It's furnished for personal use as well as guests.
Through the years, many items have disappeared, apparently deciding to live elsewhere. Among my favorites of the Never-to-be-Seen-Again items are an expensive chef's knife, small (but powerful) binoculars, couple of figurines from Indonesia, a couple of jeweled boxes from China and India...and other things that have faded in memory.
Of the more recent departures (a year ago): two flatware place settings, BBQ utensils, insulated coolers and gel packs, plastic-ware...stuff probably taken on an outing and forgotten or left.
I used to have out sets of 8 of dinnerware, drink cups/glasses, utensils, etc., and realized it was part of the problem when there are only two guests. Now I leave out only 4 of everything and only 2 quality prep knives. The housecleaner can now tell at a glance whether anything has run away with the last departed guest. For a year, everything has been accounted for in the kitchen.
I've also had 3 pillow protectors run away from home.
Probably what gets 'lost' the most are the good batteries in the remotes. They seem to routinely get switched out for the 99-cents Store wannabe's.