[dsr_]

It's coming from users, of course. If you give a designer a knob, they will tweak it.

End users don't care if they get Arial, Helvetica, Helvetica Neue or system sans-serif -- except in the case where they set it up themselves, and they're rather upset that you aren't using their preferred versions. But that's OK too, because those end users are almost as rare as designers.

All the inconsistency problems you're noting are of your own devising.

In conclusion, http://bettermotherfuckingwebsite.com/ forever, because https://thebestmotherfucking.website/ goes too far.

[jmiserez]

To be honest, I like the one without any CSS the best. The others have too much empty space.

[gowld]

Is rather have weird fonts than a site that curses and screams at me.