I did blind search engine testing and Google came out on top.
That said Google is frustrating me more and more, especially now you need to "put it in quotes" if you don't want them to just show you things they think might be tangentially related in some way to your search and, you know, show you results with the actual terms in.
It's quite interesting to me that Google's main advantage when I first used it was I didn't need to AND all my terms together, it was the differentiating feature that won me over (I can't recall who from, it was around the time of Teoma and AllTheWeb IIRC). Now even when you use the cumbersome notation to say a term is required it still shows you pages without the term on ... but it nonetheless is the best offering I can find (for me). Argh!
Also: news, and book or Google Scholar.
I'm willing to accept the lack of these most of the time. Yes, privacy matters to me.
Not exactly what I'm after but might be useful, thanks.
* When I want a local result (i.e. I'm googling for business cards, and I want a UK based company that will sell them to me). This is because DuckDuckGo doesn't use your location (by default).
* When I am searching for a word that means something different to me than for the general population. For instance when I search for Python I don't want to see snakes. Google does this by tracking the results you click and forming a profile of you.
I guess the DuckDuckGo way is to search these by !uk and !programming, but that is a whole extra word to type. It would be nice if it let you list your interests in its settings page, creating your own filter bubble.
You opt into one or few of this personae and each query sent to a search engine would track this persona.
The key is that these categories should be few and predefined (i.e. offered by the search engine) so that they cannot be used to track individual users.
I've noticed trying to find news stories that are not in wide circulation (small events in foreign countries or not-so-wide-spread announcements) are much harder to find on DDG.
Having said that, I try to use DDG FIRST, then move on to other engines if it will not provide. It does feel like a sacrifice from Google; I guess they know me real real well.