No desire. The last thing I would want is someone else to profit from my images for a one time licensing fee and use them how every they want. I would license for a fee + royalties (if used on products) or for a specific purpose for a one time fee like magazine publication. So I'm not against licensing as there is a lot of money in licensing your work if done the right and most profitable way but not at .25 an image. I make more posting on Steemit and retaining all of my rights than I would selling on stock on a microstock site.
The other problem is with the kind of photography I do, is some of it could be used in a way that might misrepresent the model.
If you have a very large library it could be a good source pf passive income. However I met a successful stock photo photographer and he told me "Shooting stock has ruined photography for me, now I see stock photo concepts everywhere I look, but it's not enjoyable anymore"
Sadly stock photos are not what it used to be since microstock came into play. At this point it's really competitive and the people making all of the money are the Microstock Websites. The photographers get paid so little these days, marketers come along pay nothing for the images and then sometimes profit heavily while the photographer got a puny one time fee. That's the downside.
The upside is if you have 10,000 boring but possible useful images sitting on your hard drive that you shot (pr want to make them) you can make some good passive income by putting them up on stockphoto websites. So for some people it's a good deal. Just mot as good as it used to be.