I like having a wide selection of decorative items available. I do not feel that everything in the buy catalogue needs to have gameplay function. In fact, I dislike items that have a moodlet effect on my sims, and I either disable them or don't use them.
I like having items that simply are visual props to the imagination, making the room feel more like a real room, creating diverse atmosphere and settings for my story scenes.
But I rarely use the gallery. I am building almost exclusively for my own personal use. So, obviously, I don't put in so much clutter that I annoy myself. :smile: