I think I'm rather excited about this edition.
It's funny, my experience through the development has been the exact opposite of 4e. There I went from 'OMGZ0RZ, NEW EDITION!' to 'hmm, I'm not sure about this rules preview...' to 'um, no. Just... no. In fact, HELL no!'. I'm glad that many groups found that 4e suited them well, but it was just not a good fit for me.
This time around, I started out very skeptical. Once it became clear I wasn't going to be able to find a playtest group, I just dropped out of reading the news feeds & didn't even worry about it until the release date was announced. Then I started catching up on things, reading over what playtest rules I could find, watching for preview info... & my reaction has been quite positive. I've got the Starter kit on order, & expect be picking up the PHB & DMG when they come out. I still have some concerns, (mainly that it reads as allowing lower character customization than I'm used to from 3.x) but I also have the sense that things may not play quite the way they read (with 1st feat at level 4, & given the greater depth of feats, it's almost liking moving PrC access up a bit - so customization may actually feel faster in play).
Looking forward to getting my hands on the new edition!