I agree with him they all have their ups and downs... but windows 3 was by far one of the worst :D
Windows-Full gaming capabilities looks like crap
Linux-Looks nice but you have to do many things manually and Wine doesn't work the greatest for games... that's what a dual boot is for.
OSX- Dont know cause I've never used it.
And most of them are rather good for working but I'd say that Linux is my favorite for that.