I am fortunate that my wife and I are very financially compatible. We never care for conspicuous consumption, nor showing off to friends or neighbors. We do not drool over fancy material stuff, nor are impressed by it.
We both do not like to go shopping. For example, when we need a new pair of shoes, we dash to the shoe store for the purpose, and are done in 15 minutes. Of course when buying larger items, such as an HDTV, we would shop around. Ever since we were married, we never carry credit card balances. Since 30 y.o., I have been paying cash for our cars, which was only 4 or 5 cars ago; we either drove them to the ground, or until they got totaled by the other idiot drivers. Writing a $20-30K check for cars keeps us focused on the car's cost, not the "affordable" monthly payments as most people consider. Oh, I am sure that some consider that is unwise use of money. It is better to borrow, while investing your cash, blah blah blah...
Actually, we did not save for ER intention like some younger forum members. Though our jobs had been reasonably secure, or as secure as they could get in the private sector, we always fretted of layoffs. We hated the insecurity of living paycheck-to-paycheck. We just didn't feel safe, and still don't, if we did not have multi-year expenses stashed up. We saved for financial security. I never thought we would retire early and I still may not, though my wife is pretty sure about herself.
When I read financial articles advising people to have 6-mo of expenses saved up, I just shook my head. How about for the rest of your life, I asked. I did not know that was called FI.