Bad commit messages? If I commit locally to switch to another branch and for no other reason I should write a novella?

You left out the big one

0) deliberately write illegible code.

My code looks more like a table than anything else; most people write jagged, cluttered garbage.

And "reinventing the wheel," I hope not many do this. What I see far more often is the same operations written in many places, often with small unintended differences, instad of breaking it out to a function.