I absolutely loooooove the gallery. I am a builder so I don't usually download others' builds unless I need something specific or I want to try out something that looks cool. But I will download lots and lots of sims. I follow a lot of creators that are really talented and expressive so not all the sims appeal to me but every once in a while, I'll download a sim or a family to use as townies. One thing I learned early on in the gallery is that each CAS creator uses a different technique for face shapes and body shapes so if your sim has a baby with another simmer's sim, the kid will look super weird just because of the different styles. Something I love doing is going through all the wonderful creations and commenting and liking them just to show support. Building a house can take 3-10 hours for me and making a sim can take an hour. People put so much effort into their work that you just have to congratulate them on a job well done. I've found that the gallery is 99% a super nice and supportive place but every once in a while you get some really mean people who steal your builds or comment trash. There's not really a good way to report them at all and EA needs to have the ability to start banning mean people from the gallery. They can do it on the forum but idk why they can't do it on the gallery.