For the past 10 months, I’ve been using Ubuntu 16.04 LTS, and now just recently, Ubuntu MATE 18.04 LTS, as my day-to-day operating system on my main laptop, a Dell XpS 15 9550. It’s been quite an adjustment, and overall I’m pretty happy with it. In the past I’ve primarily used Windows (XP, 7, 10) at work and OS X / macOS at home. When I worked in technical support, all but one of my test VMs were Linux-based (CentOS in that case), and I really enjoyed working on them.