I guess I'm mostly asking about professional e-mails here. I usually go with "Thanks," but I used to just sign off with my name after a '-'. That seemed a bit too cold though. I've seen all kinds of stuff: "Best," "Regards," "Cheers," "xoxo". So what's your go-to and what do you think that says about you?

Usually I just go the old fashioned "Sincerely, Kyndo", because everybody knows it's just meaningless pleasantry. Anything else, and I feel like people would believe I actually mean it.

However, I'm considering maybe switching over to "Good day sir. I said Good day!"

Deuces

I picked up "Thank you for your time" from my work partner when I used to work in college housing (we worked in pairs, and had to send a summary email at the end of every shift). I like it because it sounds nice, but is a bit of a platitude, and not as personal as "sincerely" feels. Works best at the end of those short messages I write all the time.

Sincerely  if it's for some professional purpose to a new contact, otherwise Take care or these days, Stay safe. I also like the idea of using exclamation marks in emails to make them seem more sincere.

You still use email?