I've been frugal all my life, though in recent years I've begun to suspect I might be better off letting it go to some extent.
My parents had very little spare money, so neither did I during my formative years. If I wanted something nice, I'd habitually look for the cheapest alternative. They also had a strong contempt for "value-added muck" (commodities with unnecessary bells and whistles as an excuse for a high price) and I grew to feel much the same way. I also took after Dad who was always content with a simple lifestyle and got little pleasure from extravagance of any kind.
So I've always shopped around for the cheapest deals, done without, or found something that doesn't quite do the job and modified it so that it does. With most of my special interests, people have been impressed that I've managed to get the results I've achieved with such down-market equipment.
It's amazing to see how many things people buy that I don't. Commute to work by car? No way. Just live near the workplace and walk or cycle. Restaurants, ready-made cigarettes, public bars, new clothes every few weeks, disposable contact lenses, ritual holidays, celebrity concerts, national lottery, tarting up the house, all completely unnecessary to me. The only reason I bought my own home was that I resented the idea of paying rent for a lifetime and owning nothing at the end of it.
I could hardly believe that "pay-day loan" sharks were thriving, or that overdrafts were popular, because I can't understand why people don't just live within their means in the first place. I used to live on half my salary and save up the rest so I had a good buffer to protect me from the threat of losing the income.
But I came to see that I was taking it too far. Sometimes it's easier to just buy the thing at a ripoff price, if it's a small thing like a can of beans and the store that would save me 10p is a 2-mile walk away through heavy traffic. I guess that's the great thing about being rich - you can take the easy way out and get on with your life instead of committing yourself to hours of tedious, uncomfortable cost-saving ventures.