I tend to stick with one distro for a while but use it across multiple uses (my home PC as a separate boot partition to Windows, and within Virtualbox as a guest in windows and also in linux itself). I find it easier to stick to one Distro and get used to the distro's paradigm.
At the moment I'm using Mint and have done for a few years. I used Lubuntu before that. I'll be sticking with Mint until I next decide to refresh my PC and will revisit what's available at that time; maybe stick with Mint or move to something else if something is appealing.