I use mustard and real mayo.
Dill Weed! Lots of it! The more, the better! Never tried fresh, though. That’s next.
I have never made the same batch of tater salad twice. I’m always messing with this or that. Next batch, I’m putting in bacon. Also, I might not put onion in and instead, go with shallots or something else.
Potato Salad is meant for experimentation.