I'm digging all the syncing of iCloud notes and reminders. I've seen a lot less spinning beach balls when working with large projects on Adobe illustrator, it feels to me to even open faster. I for one am digging ML.
And who gives a rats ass about the facebook or twitter, if you don't like then don't sign in. That simple.
I'll wait about a year after CS6, because Adobe is always wonky, but the iCloud being added will be awesome.