The OpenSUSE distros--Leap and Tumbleweed--don't get a lot of attention but they're worthy, relatively easy to use, alternatives to Ubuntu and Arch respectively.
Leap is an LTS distro that is more up to date than Ubuntu LTS and Tumbleweed is a rolling release that has enough QA that it doesn't blow up as frequently as Arch.
I just installed OpenSUSE on 7 computers over the last month. On my personal ones, I was previously running Kubuntu, then Manjaro, and now OpenSUSE. On work ones, most were on CentOS 7. I installed Tumbleweed on the personal ones, including a laptop, and Leap on the work ones.
Overall my experience has been great and I love OpenSUSE. However, I definitely would not recommend them for beginners for a few reasons.
Tumbleweed doesn't support certain browser video out of the box in Firefox. I had to enable a repository, and download libav packages to get it to work. The package names were confusing (why do I need libav 56 and 57 when 58 is already installed?). I had already installed the packages from the default repo, but they specifically needed to be installed from Packman.
GUI scaling between different displays is completely broken on Leap. Certain things scale, other things don't, and it looks horrible.
Normally, I get super annoyed when people take little things like that and make a huge issue out of them. They are little problems and I solved both of them, and love OPENS USE. But with Manjaro, I didn't have any problems from fresh install. Even switchable laptop graphics worked. Manjaro is very easy to recommend to someone afraid to open a terminal.
Leap is an LTS distro that is more up to date than Ubuntu LTS and Tumbleweed is a rolling release that has enough QA that it doesn't blow up as frequently as Arch.