While I dislike infinite scroll for threads and thread lists, I do think that media browsing does lend itself to this mechanism.
I'd at least like to have the option to turn it on or off for media.
It doesn't even have to be fully "infinite" ... just lazy load a few more pages of images before it prompts you to load more or paginates ... browsing through hundreds of photos can be time consuming when you have to keep clicking "next page".
I note that Google image search on loads a few pages automatically on scrolling before prompting you show more results:
... it also doesn't keep loading infinitely (images stop after a few more pages).