The classification is going to depend on your discipline. I am "advanced" when dealing with .25 - 1.20 size glow sportplanes. I have no status when dealing with Jets...don't know the first thing about them. Likewise, I have no status dealing with Q-500 aircraft. I'm sure I could eventually figure these things out, but for the time being I don't worry about it.

If you don't have any interest in jets, or 50cc plus, or electrics....why should you learn them? You can still be an expert in whatever "field" you like the best.