The PR function is not one of my favourite either...
But like Nicolas pointed out - when the whole purpose of the watch is the power reserve it's hard to argue about it's existance!
One of my favourite vintage PR-watches:

Not my watch; but I had the chance to play with this Breguet for a couple of days - and it's a stunning piece!
Manual movement - I really like the way they choose to display the PR.

Best
Blomman