I started using DDG this year. I've found the main thing that drives me back to Google (and frequently) is searching for anything where freshness of results matters; that's where I'm seeing the biggest difference in quality of results.
This is something actively being worked on that we hope to have an update for in 2016.
We also recently released a new "News Instant Answer" that pulls in fresh relevant content on popular news topics. Have you come across that in your searches? And, are there any specific topics where you are looking for more freshness and currently aren't getting it?