The new interface etc. I can get used to - it's just a matter of time before you forget how it used to look. I like the calendar side pane - quite handy. What I'm not happy about however, is that the new version seems to take an eternity to download messages. Is it just me, or has anyone else noticed this?
Also, what's this Live SkyDrive for photos all about? Does the recipient have to have these latest updates installed too, to be able to receive the photos in this format? What happens if they don't? I find it annoying if attaching more than one photo, that it selects this format by default - if you don't want to send photos as a fancy presentation, you have to manually deselect the photo album on the format tab.
Why can't MS stop messing around with stuff that works fine and does what it says on the tin? Why the constant need to add bells & whistles? If I wanted to show off, I'd have bought a Mac.
(added for effect, because posting a plain message without a silly smiley is no longer considered adequate by some)