I do. I'm a computer geek, so "Linux" isn't something foreign to me. Ubuntu is great for a home desktop. The extensive repositories make it easy to get pretty much anything you need. And the
http://ubuntuforums.org support community has some great help. If you want to search on how to do something, or get something to work, just search the forums and you'll have your answer.
Though I must admit, to do anything beyond the basics, you need some technical ability/confidence. If the idea of typing commands on the command line scares you, then sticking with Windows is a good idea.
That being said, when my sister had a computer for me to setup for her, I stuck Ubuntu on it and she says it does what she needs. Browse the web (i.e. YouTube), email, word processing (OpenOffice). It could probably fit the needs of most....and the $0 price tag quite nice.