I used to do that to. And the first time I tried Red Hat Linux in 2000, I didn't like it at all. But new Ubuntu is just awesome. While Windows 7 is as slow as a turtle on my Core2duo, Ubuntu works just fine. And I enjoy fast and secure web browsing now. After using Ubuntu I don't want to get back to Windows. I wish there were more software for Linux... but most things that I really need are already there.

And it is so easy to install Ubuntu. I had much more problems installing Windows 7 and Vista (of course they install just fine if you format your hard drive). And you can even install Ubuntu from Windows using WUBI. Although the latter is not a very good solution, but it is very easy for newbies.

After using Ubuntu successfully, I started thinking that Linux is great and M$ just has a huge marketing budget.
I can't imagine not only google, but even this web-site running on Windows servers

More:
Holy War: Windows vs. Linux, open source vs. propritary soft, command line vs. GUI