Firefox or Internet Explorer?

When I first was using a Windows computer, I always used Internet Explorer. I downloaded Firefox to test my web development skills on another browser. But after using Firefox for 5 minutes, I was hooked. I've been using Firefox for about a year now, but now with Internet Explorer 8, I find myself using that browser occasionally. When I look at the statistics for my website, there are more Firefox users out there than Internet Explorer. Now its hard to tell which one's better. I still use Firefox as my main browser, but could Internet Explorer make a come-back?