Very good top, @obest!

I haven't included witnesses in my list, because I know there are people here after months who don't know what witnesses' role is and how to vote for one.

Even though witnesses are very important, apparently some just use this platform ignoring them for a long period of time. Likewise, I haven't included delegation among the first preoccupations of a beginner.

Your second point is very important! I only mentioned the importance of the owner key in the list above, but in the linked post, there's an explanation for the role of every private key. Yep, this should've definitely be in my Top 3 too! But it seems it's complicated to reduce them to only 3.

The third point is similar to my first one, except you explain clearly a certain difficulty you had when combining many of those new notions.

Thanks for your input, that's very valuable!