For technical searches it really helps being able weed out old content and solutions (old rails 2 solutions, etc).
However there are a lot of times at work where having search results relevant to me is essential. Since DDG is all about not being the search bubble, to use them all of the time, I'd have to change the way I worked to bookmark my projects and search for my blog entries in the blog's search bar instead of just using the omnibox in Chrome (that is using Google) for everything.
Reason #2 is that search advertising helps pay for the GMail service that I rely on. I don't want to go back to my cable company's email accounts. Yuck. Terrible spam filtering and much worse webmail UI.
But, I'd like to stop using Google as much as the next guy. I'm waaaay too reliant, and I'd be surprised if the U.S. hasn't infiltrated their employee ranks, along with other countries, for greater influence and access to data than is even currently known by congress. Using Google is like living in a whorehouse.
That's the problem with domains these days. Yay we're using a Libyan domain and whoops (remember- they took it offline http://readwrite.com/2011/02/20/what_happens_to_ly_domains_w...). io - British Indian Ocean Territory: same deal. People aren't thinking.
EDIT: Just as an aside, Fastmail is operated by Opera and runs on many domains that they control. For example, their IMAP and SMTP servers are messagingengine.com.
And I love the spartan results page I get back. It's easy on the eyes.
Being limited to only the jquery docs vs. googling until I found a random stack overflow question that I could copypasta helped me improve as a developer.
Hopefully someone will tell me there's a way to fix that, but limiting sites to a single result is a poor design choice. And forcing me to think "maybe this site has more relevant related pages" and act on that thought doesn't work, because I prefer to scan the results DDG has already given me.
Using Google for well over a decade means I am used to typing as little as possible to get results. Filter bubbles are more relevant to searches for BP, Egypt etc.
Then why are you using DDG?