.photos vs. .photography
I have a few keywordphotography.com domains myself but would never get one with photos. Why?
When I think of photos, I think of the end result, limited. Photography on the other hand is a business, service, hobby. It could also be a how to site that can be monetized many different ways. It could also be a site on pics or photos. It's the most versatile out of that bunch. There are lot of people that get into this for business, full time or just on the side. It's why if you search on .photography, you'll find many such small, mom and pop type sites. I know a few people myself that do this for a living.
pics, photo, photos, all the same thing basically and also a poor investment for domainers since end users have much to choose from
.photography will have more regs than any of those