Since my day job requires a fair amount of web development I tend to look at a lot of different browsers to see how pages are rendered in each. I also tend to switch browsers every coupld of years, and am doing it again.
Years ago I made the switch to FireFox as I liked the tabbed browsing and speed. I then switched to Shiretoko which is basically a 64bit port of Firefox. I loved the speed, memory useage, and manageability of it but of course it neither supported flash or HTML5.
IE made some inroads with me with IE7 and IE8 to the point where my company now only runs IE8 on machines except for a couple which have a variety for testing reasons. Employees are pretty much required to run IE as I got tired of complaints of what did and did not work where and when. Standardization can be a good thing.
A while back I ran the IE9 preview and was impressed. Of course those in the industry know that a preview version just is not a real browser so testing is very limited and sometimes misleading.
I just installed the beta version of IE9 and all I can say is WOW! This thing is lean, fast, flexible and supports the HTML5 MP4 video I really wanted. Since IE9 will be a standard Windows update once the general release comes along that means that all retail computers (Windows PCs, Macs, iPhones/iPods/iPads, Androids, Blackberries, etc) will have native support for H.264 video right out of the box with no plugins required, YES!
It also has a lot of other features, such as a very effective ad blocking system that... shall we say works quite well
If you are not afraid of trying beta software I think you should give IE9 beta a try. I am uninstalling FireFox (Shiretoko) tonight and moving back to IE as my standard browser on my home machine, and installing IE9 on the bulk of the office machines next week assuming it remains as stable as it has been thus far.
Allan