I'm with Doogs on this one.
The new Photobucket has a nicer look to it but it is missing a few features from the original, and I too have reverted from the Beta. Nice thing is, you can leave comments about why you changed back so hopefully they will take note.
I've had recent trouble uploading photos via email, but I don't do that often so its not a big deal.
Like Doogs said, they made it easy with one-click image links, and I liked having a list of my library on the main page rather than having to click a link or two to view it. So I prefer the old version at this point.
Any ways, its what I've been using for years now and don't foresee a change unless something really irritates.