There's been a lot of discussion in the past few hours regarding 'Master Builder'.
To me, Master Builder is a title, but not a rank. Master Builders are no different to OPs; it is a title to show you are great at building, or great at other forms of creativity. I believe that you shouldn't have to apply for a title, and instead the ECD should pick people that they seem fit for MB.
That's my view, but what's yours? If you're an OP, MB or an admin, it doesn't matter, I and I think many others would like to know what you see 'Master Builder' as.