Let me first of all say the simple answer to your question for me is no. I know that a typical domain name even in legacy extensions has a probability of about 1 in 100 of selling in any one year (and for the country code and new extensions that make up the majority of my portfolio it is even smaller), so my expectations are realistic and I do not expect any particular domain name to likely sell even in a few years.
It is true that names that have sold, or received offers, are not in many cases the ones I would have predicted. But I think that is just small number statistics and the fact that to have an offer/buyer only needs a single person seriously interested (although probable sales need many).
I guess the domain name I was most surprised that got no interest was nanoAZ in com. I promoted it on my site and a bit on social media, and eventually put it up for auction on NPs and it did not get a single bid! I regret but after that lack of interest I decided to let it drop if the domain community saw no value in it. After I let it drop I decided I would get it again, but noticed that almost immediately it was picked up by a Chinese domain investor and is currently for sale there. I wish I had had the confidence to keep it - 6 letters, starts with nano that has multiple meanings and nanotechnology is no doubt one of the biggest things of the coming decade, is pronounceable, the AZ works as a reference site if one wants that. Probably had I not tried to auction it (my first try at an auction on NPs and held too close to expiration and not done as well as I should re promotion) I would have kept it. The experience taught me that while other opinions matter, do have confidence in your own analysis. Anyway it is a domain now gone and time to move on.
Another name that got no queries that I liked a lot but I let drop after no queries was campfires in the .ca extension. With so much camping, summer camps, outdoor living, etc. in Canada I thought it was a nice name. I tried a bit of social media soft promotion, and no queries let it go. It was snapped up by a Canadian domain outfit and is for sale. Not sure if they are NPs represented. Interestingly their name ends in fires so I guess appropriate that they took campfires! I still like the name a lot, again regrets.
Of the domain names I still have, I had hopes for (despite few sales in the extension) CRISPR in the .science extension. CRISPR is in headlines and was the science breakthrough of year in 2015 and will revolutionized health, agriculture, biomedical research, etc. I plan to definitely keep it until I get an end user and have it renewed several years more and may add to that. It was one of my early domains in the new extensions and I think someone will want the elegance of the exact acronym in the extension that matches it. The acronym in .com apparently sold for $75,000. So a little surprised no reasonable offers, although not really surprised no sale in the two years I have held it.
Thanks for the thread,
@Want2learn !
Bob