This SBQ was suggested by Ternezia and is:
What for you means to achieve mastery as a stitcher?
I never really thought about "achieving mastery". I am a self taught stitcher, though I did embroidery when I was a child - mostly stitching over iron on patterns (Aunt Martha's and such) and a little bit of stamped cross stitch. I originally bought one of those cheap little $1 ornament kits with the plastic frame at the craft store just to try it out, but ended up doing a larger project instead and it went on from there.
I am comfortable modifying patterns, combining patterns, changing colors, etc. I've done some specialty stitches and I don't have a hard time figuring them out from written, illustrated instructions. I can also do a lot of my own mounting, framing and finishing.
I guess what I would consider mastery for myself is completing a hardanger piece.