It's also nice that there's a PDF reader built-in, although I switched to Adobe Reader because I don't see any reason to read PDFs full screen. The photos app is nice and I like that it can access Facebook and SkyDrive, but I still prefer Photo Gallery. I disabled the Messaging app in favour of Messenger because again, I don't see a reason to have a full screen chat window.
Don't forget that you can drag things to the side of the screen (as long as you are using a widescreen monitor). This helps when you don't want to run an app like Music in full screen but still want to see the song list. It should be very handy for messenger too.