How do you guys decide to spend money (or not) on home decorations?

That was a big one for me, especially when I was renting. I couldn’t justify to myself spending money on decor when I knew I’d be moving again in a year or two. Which is silly, if I’m living there at that moment, why didn’t I make it my own? Now that I own my own condo I’m better about it, and I like to fill it with souvenirs from trips and other fun things.