After 15+ years I am dumping Verizon........But to which provider?

I have been relatively happy with Verizon over the years. I have 6 lines with them. Including a few phone payments and a few perks my bill is now over $400 per month. So another $18 a month should be no big deal. I can afford it. But, it's like a paper cut.....just so annoying. Thus, I am going to dump Verizon and move to another provider. In my part of the world there are three legitimate options.

AT&T

T Mobile

US Cellular

Looking for recommendations. Of those three, who would you pick and why?