I love the hideouts in PoE. I think it's a nice little touch for everyone to customize and make their own while also providing each player their own hub for trading. Personally I'm a big fan of function and I keep my hideout very clean and simple. I have my stash, map device and masters all close together so that whoever is in my hideout doesn't have to wander off to find anything that they might need. I also like the coastal hideout, the version I'm using, because it is very easy to see everything on the sandy backdrop.
Simple and clean is the best!