In old Opera I can navigate through links in a page with Shift/Ctrl + arrow keys shortcut and press enter to access the highlighted link.
I would love for the new Opera to have this feature back. I think it's great for people who have their hands on the keyboard for most of the time so we don't have to reach the mouse every time we want to go to a specific link in a page.
(I know pressing Tabs essentially doing the same thing, but the new Opera doesn't show which link is being selected, and the selection is only linear)