Hmm... back to the original subject.
I loved IE until I started to give other browsers a chance. After 2-3 weeks using Firefox exclusively, I realized how much IE was missing. When you use IE excusively, how do you know that there aren't other features that you could benefit from? It didn't take me long to realize that Firefox offered a whole new world (*cue the music*) of options for web browsing. (Note that this isn't just the case for Firefox, I'm just speaking from experience).
On a different note, when I began designing websites I came to realize that IE (6 and below) is a NIGHTMARE. I can test a site in 6 browsers, with IE being the only one to render the page(s) wrong. I could spend days talking about it, but the basic gist is that Microsoft is part of the web-standards consortium, yet they break the very rules that they claim to help put in place. I really, really, really, really, really, really hope that IE 7 makes a HUGE step in the right direction by adhering more closely to these standards.
I could go on, but that's it for now.