Install a few and see which one you like the most. You can install several distros at the same time and they’ll all appear in the boot menu. When I was deciding which distro to use on my laptop, I was dual booting Debian and Fedora, with one /home partition shared between both of them.
Mint and Fedora are good choices IMO. Everyone is different though :)
Good points. I was using KDE with both and didn’t have any issues (even though Debian’s version of KDE was older) but that might not work in all scenarios.
I don’t have compiled things in the home folder - they go in either
/usr/local/bin
or/opt
.