you need to ask yourself 2 questions:
1. what would YOU do with this domain? (keep and develop for yourself or sell?)
2. If sell, what would end user do with this domain.
registering brandable domains are needed only if you know for sure this would be a wonderful brand for someone, or if you are opening a company yourself and want it for you. keep in mind that out of 1000 brandable domains may be 1 would find its end user.
hand registering "exact google searches" is for people who can develop the domain into some blog talking about that search, and generating views and clicks for google ads. this kind of domains become valuable either after they get developed, or if there is plenty of search results and buyers see the potential.
hand registering premium keywords .... well... good luck with that. lol.
so first, ask yourself the question what you going to do with the domain, do you personally see the potential in it, and keep in mind that hand registered domains are in 95% or more have no traffic at all, well unless they generate natural type-ins, that happens sometime with exact google searches or premium keywords

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good luck.