I love headphones. I can listen to loud music any time of day or night without disturbing the neighbors, while sitting on my favorite chair or lying on my bed snug in the covers.
Compared to speakers, I get far more resolution for the cost.
I have a personality flaw (or advantage?)---I am often not content with what I have, and I'm driven to upgrade. When I find a good audio company or designer who makes stuff I really love, it means that their taste matches my taste. Audio is subjective, so there is no absolute truth. There is only the lovely discovery of finding that I share a way of perceiving music with someone who is good at making audio equipment.
Some companies I've been fanatical about in the past are Naim (British company) and Donald North Audio (an American manufacturer of speakers and headphone amps).
More recently, I discovered Igor Kuznetsoff (company name: K Works Audio), a guy who does custom modifications, and his taste seems to agree with mine precisely. Custom modifications are always a risk. It's not like purchasing items from an internet retailer (like Headroom) with a money-back guarantee. I had to take some leaps of faith, but I am pleased with the result.
Here are descriptions and photos of items in my headphone system.