First of all, let’s try to avoid American-bashing, and stay respectful to everyone.
I’ll start: for me it’s the tipping culture. Especially nowadays, with the recent post on !mildlyinfuriating@lemmy.world with the 40% tip, it just seems so weird to me to have to pay extra just so that menu prices can stay low.
Many years ago, I was chatting with a friend from California and she told me her family votes Republican. As in, by default. No matter the policies or political needs of the country.
Aside from the US parties being very similar back then (pre-Trump), I’ve also learned since then that this may have to do with party affiliation programs.
In the US, you need to register to vote and the parties basically offer to do the registration for you, if you promise to vote for them. So, you end up being ‘affiliated’ with them, even without being actively a member.