This is an ongoing, updated post of things I wish I knew beforehand.
CentOS is a solid base for any server, as it requires minimum maintenance and is very conservative when it comes to updated versions.
This post will be a mess at first, but continue to grow and evolve.
Current systemd for CentOS7
Up to date and legacy PHP versions
Current LTS or mainline kernel
More up to date qemu
yum install centos-release-qemu-ev