I also find dual boot painful. On my old machine I switched main OS several times (back and forth from Windows to Linux). I couldn't dual-boot because it just wouldn't be fun. There's no real way to share data properly between the two OSes, I wouldn't have the exact same set of available apps, etc.

Now I have a MacBook with OS X. It combines the things I want from Windows and Linux, so I have no need to change OS. If I really need Linux or Windows for something, hardware virtualisation makes things easy.