Why do people like Firefox? It's probably the least user-friendly thing I've ever downloaded, and I've found it impossible to uninstall completely.
Security is a big one. Tons more secure than Internet Explorer.
Tabbed browsing is also a great feature. Saves lots of space on your screen. I wouldn't be able to use a browser without tabbed browsing.
Also, it supports web standards more than Internet Explorer (which holds back web designers like me who want to implement cool things!)
Loomis - you can download themes for Firefox that may be more pleasing for you.
https://addons.mozil...firefox/themes/Are you running it on Mac or Windows?
A plugin that I find very helpful is Google Browser Sync. This is great for people who use more than one computer (eg, home and work) as it lets you sync your bookmarks between the computers.
The new version of Firefox also comes with search suggestions. As you start typing a search query in the box in the top right corner, search suggestions start appearing for you.
I'm sure others can post reasons why they prefer it as well.