Small but surprisingly annoying thing about DDG: I have to hit TAB too many times to start cycling through search results, on google one TAB takes me to the first search result, on DDG it's an unintuitive series of links.
Unfortunately, I use vimperator so j and k scroll for me. I'm glad to see some sites incorporating some good keyboard shortcuts, though! Maybe one day I can ditch vimperator in favor of common keyboard commands in my favorite sites.