He's seen it, and Jet Li and him are good friends. Don't know how he feels about Jacky Cheung though.

Probably all of the above ! People like him made the greatness of Hong Kong action cinema with their blood, sweat, and broken bones. Now kowtowing to him.

Probably the late Darren Shahlavi, though he's not from the Golden Age of HK action cinema.

A year ago I'd have answered that he's better without, because while Yuen Woo Ping gave him his break in Hong Kong action films and some of his earlier classics, Donnie only became an A-list action star and trailblazing action director a decade after the two stopped collaborating.
But now, I'll have to see Ip Man 3 and Crouching Tiger 2 before I give a fuller opinion.

Neither in my opinion. It's humour, and I believe you should be able to laugh about absolutely everything, save perhaps for tragedies that are very recent. Once you can't laugh about everything anymore, you lose a precious catalyst. Political correctness, in short, is the death of the soul.

I'd say The Medallion is worse, because it shoehorns cheesy supernatural elements that just don't fit with Jackie Chan's style, and ends in a flurry of shitty CGI.
Mr Nice Guy is average at best, but has at least one or two moments of brilliance (like the construction site fight).

Probably Millionaire's Express, though another day I might answer Dragons Forever or Pedicab Driver.