My favorite type of luxury is long-lasting products.
The more I use a product, the more important it seems to me to be quality.
Examples: monitor, keyboard, mouse, speakers.
I spend a lot of time on my PC, on a chair, and on a bed. I try to have these as comfortable and long-lasting as possible.
My current mattress is fine, I don’t plan to change it, but when I’ll do, I’ll likely consider a better one.