Best charging options

[AC Question]

While I wait for my phone from Verizon, I wanted to buy some extra cables and wall chargers if needed. What is the best charging options? usb-c to usb-c or usb-c to usb 3.0? Maybe they all work good. I don't know what comes in the box.

 

[hallux]

What phone? Some phones don't strictly follow the USB-C spec *cough** Samsung with QC **cough** so the charging cable decisions would be different from someone with, say, a Nexus 6P.