What’s a mistake you made by being impulsive?

A good question for sure. I lusted after a particular brand X amp made by a boutique company until I had the money to purchase one. I also purchased the preamp....then another preamp. I won't disclose the name here but the experience with the quality and performance was poor and the guy who makes the equipment was an arrogant jerk. I ended up losing lots of cash (mind you this is a poor's man's system bought with hard earning money) and I will be much, much more careful in the future. My current system has had no problems, while I see other people buying brand X and still having QC issues. The term still applies "buyer beware" to audio equipment.
BTW I did not immediately regret my decision.... but rather learned that some hyped up brands do not always meet expectations. In the case of poor workmanship, you must determine how much a company will cut corners to sell products.
A good example of this is by Danny Richie at GR research. https://youtu.be/1S-jTJK43t0

Helomech-
Haha yeah you and I have learned a few lessons about hype from manufacturers.... for sure.

BTW I had to inquire and ask questions from a now popular speaker company about "who" makes their drivers. These questions were never answered and I felt wiser than before when I made all the wrong choices in buying from audio brand X. Brand X guy never answered the phone and always made excuses. If companies are honest and I see others getting good communication from the smaller boutique audio manufacturers I can feel confident with a purchase. I feel that when a company asks outrageous prices for the gear they sell.... one should be skeptical that you might not get an equitable amount of performance for the price. That was proved by Danny in the video I posted in my previous post. But the same holds true for audio companies that claim they have the best bargain prices for "high end" stuff. I have often found those companies cut corners to offer that "high end" stuff at the price they do. That sometimes means their el-cheapo capacitors fail much more often or the transformers they buy from china are junk and buzz. (Not knocking all Chinese gear, I have a Chinese amp that is very nice and has given great customer service). I am saying I think in those cases of el-cheapo capacitors and transformers, you really do get what you pay for because the manufacturer is just putting a sale above all else.
But hey man I am happy now, hope you are doing well with your system too.