It's weird... my mom is super frugal and my dad is relatively cheap himself but they'll definitely spend on stuff and also tend to hoard. It's stuck in my mom's mind, especially, to score the cheapest/lowest price on whatever she can and by whatever means possible (coupons, bargaining, additional discounts, stacking, etc). I think this is where I get my frugality from. However, especially now that the both of them are retired, they tend to go overboard on stuff. Even before that though my mom would constantly buy knick-knacks and random stuff from travels and just in general... things that we would end up throwing away. And she still does even to this day - my wife often laments how they could have just given us the money they used to buy the junk and we'd be much happier off. It's true. Whenever we visit them she often has baskets full of knick-knacks in my room and my brothers' rooms. If you look in the hall closet, there are boxes of travel size toothpastes, toothbrushes, razors, soap etc that she either got for free or "cheap" but still got tons of. So while her deal-hunting might be "Mustachian" I certainly call into question the quantity of what she's gotten and also the hoarding mentality.
With my dad, it's very different. He's selectively spendy - so he'll go and spend retail price on something he thinks is a great item but it ends up being cheap, crappy, and or useless (anything in the technology or gadget category). He buys *countless* gadgets and toys. One of my brother's old rooms is full of his crap. He has like several TVs, laptops, and computers. I really don't know why anyone would need that much stuff as I'm sure he barely uses 99.9% of any of it. When it comes to toys for himself, he'll go buck-wild on anything he thinks he "needs" and will almost always go and get the very thing my brothers and I advise against him buying.
To them, all this money is funny-money anyway. He was sharing with us recently and gave us a small peek into their finances and they are basically living off a six-figure income while retired due to their pensions and investments. And on top of that, there are supposedly going to be inheritances left behind for us too. So I guess they have no real reason to be "Mustachian" even though my mom might argue that she lives that lifestyle... I would say, perhaps in the earlier years, they were a lot more Mustachian (especially my mom) but over the years I think their desire for "stuff" has just skyrocketed. They have been traveling more too though, which is good, and I'd rather have them do that then keep buying crap they don't need.
Unfortunately, I picked up some of these unhealthy buying/spending/hoarding habits but more in favor of my mom. Slowly, my wife has been helping me to quit buying crap even if it's cheap and even if it's good quality and if I think I'll need it. I was kinda crazy before getting married though.
I think my brothers picked up similar mentalities too - my second oldest more in the direction of my dad except he buys the *best* stuff and hoards it. My oldest brother is relatively cheap too like my mom and wins a lot of stuff via contests. He'll actually spend on what he deems is worth spending on and will not overextend himself. So he is probably the most sensible out of all of us in terms of spending, but I think hoarding is still somewhat of a problem.
