I've come to accept minimalism as encompassing a kind of mindfulness. You've lived without a couch, considered that against the alternative, and maybe you decided that you want to have a couch in your life. Nothing wrong with that.

Consciously making a decision before deciding to buy a new thing is a laudable practice; it's the mindless spending of money that really kills you.

It is said that it took Steve Jobs ten years to buy a couch. Without making a value judgement one way or the other on that long decision, I'll just point out that in the end, he did buy that couch.