While I wouldn't go so far as to say I've lived a Mustachian life, I've always had trouble parting with my money unless I could see a direct and tangible benefit out of it. I've never purchased a new car (in fact, at the age of 34, I'm still only on my second car), and have avoided buying things on credit. I never subscribed to cable TV and never even owned a real cell phone until about a year ago. (And that costs me under $15/month.) There are three things I've done (or am doing), which come to mind as anti-mustachian.
1) I joined the Air Force after high school and while the pay was low (somewhere around today's minimum wage, if I recall), I had access to free food, housing, and education. So instead of saving or investing all of my money, I spent it on computers, video games, and airline tickets. After four years of active duty, I hadn't saved or invested a thing.
2) I recently bought a house in a suburb which is about a 15-minute or 25-minute drive from where I work, depending on whether I take the expressway or not. The nearest grocery store is about 7 miles away, and it's down a two-lane country road with no shoulder to bike on. (Read: a long and extremely dangerous haul.) So we're enslaved to our two cars until we decide to move. Which we be awhile because other than the location, we really do like the house.
3) I recently bought a motorcycle. Not a brand-new financed crotch rocket, I bought a fixer-upper for $250. I thought this would be a cheap way to get into motorcycling and learn how to wrench on a bike, but it turns out that bringing a 33 year-old motorcycle back to road-worthiness is not cheap. I estimate that I have about $1500 total into it so far and I anticipate at least another $300 to get it running right. When I decide to sell it, I probably won't get more than $1000 because it's in fairly rough cosmetic condition. I do love riding it, though, and plan to switch to something newer like a used GS500 or mid-sized Ninja next year. I feel guilty about the money spent on this without any real return, but it turns out that this hobby makes me really happy. Since I'm a computer wonk, I needed something that didn't involve me sitting in front of a computer.