It’s wonderful to build this for yourself. However, when working on our larger projects or with larger teams, they’d have to learn all the random things you came up with, in your own way of thinking and so on. That doesn’t go well sometimes but sometimes it does work out. But if you leave the project, your favorite creation could become a newcommer’s nightmare that being a reason why we need to standardize quite a bit. If someone had to maintain your code, would they feel the same way you do about the code you hate maintaining now? If the answer is a resounding no then you most likely are on the right path.