I have never seen a better analog stick than the one on the N64 or GCN controller.
Anything else is unaccetable to play good Nintendo Games, I even got the chance to play with the new XBOX 360 controller and I think the analog stick sucks compared to the Nintendo ones.
Most analog sticks are too soft and don't seem to be as sensitive and precise as the N64,making movements less smooth and hard to control.
Like you push it a little,nothig happens,you push it a little further, it goes all the way to the side......I hate that !
I read somewhere that Nintendo has (among many others) a special patent for the analog stick that makes it unique.
I use my GCN gamepad even with MAME games, the ones that require analog stick or dial.It's the only controller worth to use for me.