As soon as there are a lot more answers, I'd like to compare that to see how it aligns with how D&D is designed. I doubt we'd have 100% consensus, but we can look at the books, and the feedback the design team gave to probably identify the top three or so priorities of the game is designed. And if those priorities match peoples' responses, then that would be a good sign. If not, then I think there is probably an area of opportunity for the design team to address.
As far as my personal opinion, if I had to pick three, I think 5e prioritizes the following:
Social
Storytelling
Fantasy
At the bottom are probably tactical and versus
Not to say the others aren't factored or important, but with optional rules, and the text in the DM's Guide about guidelines, and feedback, I'd say those are probably at the top. I put storytelling up there because 5e seems to really stress the lore, history, and story of the D&D world in their products. If I were part of the 5e design team and asked to give a one liner, it would be "Get together with friends either in person, in an AL game, or online to engage in a heroic fantasy game to create memorable stories." I probably wouldn't even mention mechanics, even though it's a big part of the game.