Network Admin stick with CentOS
Desktop user- Ubuntu

https://www.centos.org/
https://ubuntu.com/

If you believe you’ve missed your calling and want to be a RedHat certified something, view you’re certificates here:
https://www.redhat.com/en/services/all-certifications-exams

If your wondering how did i view both Distros on 2 windows, that’s because i installed them both on VirtualBox virtual machines. Here’s a video on how to do that: (do try it, the way i explain it, its really not that hard)
https://www.youtube.com/watch?v=w1vpNSXNJoM&t=57s