Opposite of FI/RE? How to spend to increase work happiness?

I realize that I don't fit in with the FIRE folks, I like my job and want to continue working even if I have financial independence.

I also feel like one of the best investments would be making my job and life as enjoyable as possible, so I want to continue working.

So for example, I've bought a nice keyboard, I like having a decent enough car to make my (short) commute enjoyable. I really like having high end headphones so I can maximize my music enjoyment while working.

What other ways can I invest in making work enjoyable?