I'm not sure about anyone else, but to me, it feels like housing needs the ability to add more items to them, both inside and outside.

For example, I believe the current setup is something like this:
Small House: 100 items inside/20 items outside.
Medium House: 150 items inside/30 items outside.
Large House: 200 items inside/40 items outside.

I find that a bit too little, especially with Medium and Large housing and would prefer it if it was increased, even a little bit to something like:
Small House: 125 items inside/25 items outside.
Medium House: 200 items inside/40 items outside or even 175 items inside/35 items outside.
Large House: 300 items inside/55 items outside or even 275 items inside/45 items outside.

I may be the only one who feels like my creativity gets a bit limited by the current system, but I've noticed with Large houses that it can be difficult to fill in all the space and even Medium homes can have this problem as well.