I have been seriously scrolling for about 12 years. One of the first things I did was join a local woodworking club with several SIG's (special interest groups) one of which is a scrolling group. We have members that have scrolled for over 65 years. So no matter how good I think I am these guys and ladies keep me humble.
I have done a few presentations at the Fox Chapel open house, one of those was on "Advanced Scrolling" My first comment was to say that there is no such thing. My explanation. Scrolling is a mechanical thing, once we learn the basics and do them well, following a line, the techniques for sharp corners, where to stop and start so that there are no nibs. etc. After that it is advanced projects not advanced scrolling, the basics never change.
When I look at a completed scrolled project fretwork, intarsia or any wood related project I look at the attention to detail. softened edges, no fuzzies, can't find the start stop points and finally how a project feels. The most complex project that has a crappy finish that feels rough with sharp edges, doesn't cut it in my book.
To me the masters are the designers! Some of the superb fretwork (Charles Hand and Russel come to mind) and some of our Intarsia artists Judy, Janette, Kathy, Bruce and so many more. They are the ones who challenge me and keep me humble.
And if I may brag a bit I have been published as a co creator (test cutter) for three clocks and one project that was all mine in SSWWC.