Had the crown since Day 1 and I choose to remain in the NN. When it comes to the system, I have mixed feelings about - and mixed feelings about the mentors I have seen on my own server.
--Pros: There are actually decent mentors who know what they are doing on my server, and do offer help wherever it's needed. Sprouts tend to get several replies in response to their questions, so at least none of them are left hanging.
--Cons: I dislike how some players can skirt on by with their status, when in actuality, they only do it for the titles, tomes and rewards. All the while, they offer no actual help to new players, get impatient with wipes/slowness of runs, play their jobs horribly, or worst blame others for faults and rage quit.

(I myself haven't ran into any ridicule as a mentor. I quietly help with brief tips here and there, doing my best to offer advice.)

If you seek to help new players and that's all you want to do, then strive to be that mentor