I like that the avatars are bigger and show more detail - makes me think I should upload one again.
And the "likes" have been fun. There is a bigger variety of smiley faces to play around with, if you have a look.
Posting videos is much easier too, so that's also a plus.
Not crazy about the loss of rep point messages, and personal messages to and from deactivated users, though.
I wish we had received a warning about that beforehand, and I hope there is some way to solve it.
Also, it seems all posts that you had saved to "Drafts" were automatically posted. So if I'm saying anything that seems half-finished or nonsensical, that's why.