I've mentioned before that I need to see all of my purses and shoes, otherwise I end up using/wearing the same few shoes or purses all the time, while others are neglected in the back of the closet. To make sure that none are neglected, all of my purses hang on the wall and all of my shoes are out on the floor in a spare bedroom.
I guess that I'm the same with my sweaters, I grab the same usual comfortable sweater (usually black) and wear it all the time. The solution to add variety to my wardrobe was to get them all out for me to see like the bags and shoes. So I have them tiered from over-the-door hooks on the outside of the bathroom and bedroom doors.
Here is a peek at most of my own vintage sweaters, a few stranglers are hanging on a rack where I have some outfits pulled ahead of time to wear. These are all buttonfront sweaters, I only have a few pullover sweaters. I don't know, I just don't buy/wear them very much.
I still have my go-to favorites, but seeing all my sweaters out at once gets me to wear some that might get neglected otherwise.