Enough to scoff at people!
Return the bookmarks bar in place as in version 12.17 or one extension!
Opera 21 has the Personal Bookmarks bar across the top of the browser (alt + P, User Interface, Show the Bookmarks Bar), so I assume you mean a vertical bookmarks display?
Ok. Here's the Neater Bookmarks extension to give you that type of display.
And a review.
To use a Chrome extension, all you need is the Opera extension, called, "Download Chrome Extension."
There's enough said about bookmarks. Feel free to chime in to one of the other threads.