Lynne Miller wrote:

Good question, but there are no challenging approaches in the WORLD.
We have our instrument rating. There comes a time when approaches are
approaches. Some are higher workload than others, but none are
"challenging."

Yes, I've been to Aspen. I've been to Hong Kong. I've been to Taipei.
Been there done that, and it's just a normal approach with some
special issues.

Lynne,
I am glad to hear your opinion that challenging instrument approaches do
not exist. Given your extensive experience, perhaps you could expand on
your reply by noting those approaches you've flown over the years that
would yield the greatest learning opportunity for instrument students.
Thanks,
-angus