As I get older, my "rules" change.
I try to avoid coach/economy on planes over 5 minutes. Sometimes there is no choice.
My hotels not only have to be ensuite, but there has to be decent wifi, a/c and heat with individual controls, (while a/c may not be needed in some areas, I don't want to be kept awake by outside noise with the windows open), a kettle or coffee maker, they must take credit cards (i'm racking up those points), and of course, be clean. I want a mixture of close to things but also a quiet area. (I am not now nor have I ever been, a hostel type person.).
I think I'm done with taking the tube from Heathrow into London as I'm tired of the nearly one hour journey and then having to walk to my hotel after a long flight. Next time, I think it's the Heathrow Express and a cab. It will cost more, but I'm worth it. Especially since my arrival will be late at night. The same goes for other cities. If a cab is really expensive, I'll look for alternatives for door to door service.(This is mostly after long flights and not necessarily short hops in Europe.)
Basically, I try to a make my travel as comfortable as I can to take off some of the stress of travel and
enjoy more. And that is why my biggest extravagance is taking my time. I no longer rush to see things and if I need a day to recharge, I take it.