As technology and our own exposure to the world advances, we find certain things that meet/exceed our needs to such a level that we only grudgingly entertain challengers.
I have a few, what are yours?
Mine, short list:
Carhartt double knee pants.
I first tried these out nearly 20 years ago,and have yet to find anything even close. Great everyday for work, riding, weddings, job interviews,etc.
Leatherman Wave mulltitool (and it's high falutin' cousins the Charge Ti, and Surge)

I'm still waiting for my original to wear out so I can get a Charge.
I may be in for a bit of a wait (it's been five years on this model, and still going strong, with daily (ab)use.
Dakota boots.
Every joke I ever made about Canadians comes to a screeching halt at the composite toe of these monsters.

Besides my court shoes, these are the ONLY thing I wear on my feet. Every day of work, every ride, every day off, period.
Sony MDR-700 headphones

originally purchased and heavily used as DJ headphones, these are now my roommate pleasing option for late night movies on the home theater. A couple of zip ties to shore up the one irritating weakness in the swivel housing, and these things will last until we all have surgically implanted resonators in our jawbones and no longer require actual speakers of any kind.