Honestly I hate the fact that browsers' default CSS exists. The person doing the frontend should have to specify their "default" CSS before the website even loads. I say this as both a user and a programmer, the same website shouldn't look different or break on different browsers unintentionally due to the browser's CSS, and I as a developer shouldn't have to rely on reset sheets to try to patch that.

Everything would be better if it were swapped around, instead of picking out a reset sheet for a site you pick out a default style...

The world would also be better if browsers rendered pugjs/slim and scss/sass and those were the default rather than html and css but I digress...