I'll say that I prefer IE7 to IE6. I can't live without RSS feeds, so it's good to have those built into the browser itself. IE7 makes it easier for web developers to code as well, although it's still far from being fully standards compliant. Stuff like PNG opacity support may seem minor but it's a life saver for web designers who had to implements hacks and workarounds to get them to work properly in IE6.
As for those who're complaining that your favourite sites don't work in IE7 and would rather stick with IE6, you'll start seeing more and more broken pages on IE6. Since web developers will slowly start to develop only for IE7, which is what the majority of their viewers will be using. And those sites which doesn't work in IE7 now, expect them to be fixed soon since MS has already started rolling out IE7 to its worldwide users.