> 2. No visitor pattern. (See grug oriented development)

This one is my particular pet-peeve. But I often think that the reason is because I suck. I'm going to read "grug".

I also hate one-liner functions.

The real geniuses of our times can convert complexity into simplicity. The subgeniuses use complexity to flex over the common developer.

Sometimes things need to be complex -- well that's okay. The real trick is to not put complexity into places it doesn't belong.