I love how most of the artists I know in real life use Macs but the majority who answered this poll on an artist-centered site said Windows. Also I voted Windows because I have a Windows computer and because I'm not an avid user of Macs (they're hella weird to use, like seriously how do those computers even work????????????).
all of them are good for different reasons/purposes I guess. If you want the best software compatibility, go with windows, if you want virus protection and the best customer service go with mac, if you're a hacker/developer/tinkerer go with Linux. there's a lot more to it than that though.