fourteener
Omono
This is a difficult question. A growing number of bonsai folks are collecting pots who aren't looking to use them with trees. That's great, but those pots are in (I think), a completely different category from functional pots that will house actual trees. The collector pots can be just about anything, while (IMO), great functional pots require more skill to design and make.
Sometimes collectors pots just aren't used because of their value. I wouldnt say they require less skill or more skill. A Wajaku pot is exceptionally skillfully made. I think some pots are so nice they interfere with the presentation of the tree and that is the problem.
I think the best potters check their ego at the door and allow the tree to be first and the pot second. Most artists want their work to be primary. There aren't a lot of budding framers out their wanting their frame to upstage the art itself. (I recognize someone can find a frame that is mind blowing).
At the end of the day a great pot is like an assist in basketball, it makes someone else better.