Speaking for myself I can say that every crash, major and minor that I have had has been attributed to something I did or didn't do that set in motion a chain of events that caused my drone to be compromised. Flying too close to the tree or house trying to get a good shot, flying past the limits of the drone such as high winds or high terrain. Not following the complete checklist or being impatient waiting for the last satellite to kick in.... It's just like real aviation. If you don't do a preflight on your plane, obtain a WX brief and just hop in the plane and go you're destined to have an issue, eventually. Just because you've hopped in and flown just a few minutes away a hundred times without issue in the past doesn't mean that #101 is going to be the same.
Of course mechanical issues can arise enroute, things break and go wrong but the vast majority of most aviation issues is pilot error. Have a look at the back of an AOPA magazine where they analyze crashes.
As much as I am pissed off at DJI for jerking everyone around with this "release", "preorder", delay, delay, delay BS in order to get people locked in and unable to spend their money elsewhere I do believe that they produce good products and have thus far been satisfied with the quality of what I have received from them.
Recently when I had a "flyaway" with one of my PhantomV2+ it was very important for me to recover it because I NEEDED to know what happened in order to prevent it from happening in the future. I can't even call it a flyaway because it did NOT fly away. I put it up in conditions outside of its' capabilities and it was blown away. I hadn't calibrated the compass in a while which caused it problems in holding position and finding home point. I also launched on a 70% battery because " I was just going up for a quick video", something I had done 100 times before without issue.