I use Ubuntu Desktop as my primary machine and find it very stable. I use it primarily for development with WebStorm, Atom, VirtualBox, Chromium, Node, and Bash. I rarely play games on it, and my taste in games is not fancy. I handle mail, videos, and writing chores in Chrome and Firefox. I listen to music via Spotify. I use the video card built into my motherboard. The most demanding thing I do with it is record videos that capture what I do on the screen.

Perhaps I am not a typical user, but nonetheless, I rarely have trouble with Linux. Everything just works.