I found the Golden way too stiff for my taste - it actually hurt to shuffle that deck. Perhaps that's because my hands are small, and it was a stretch to reach from one sided to the other, because the deck was so thick. I considered Umbrae-ing that one, but never did. In fact, perhaps I'll buy another copy and do just that. It worked on my Ukiyoe - which had stiff card stock with almost sharp edges.
I agree on Haindl card stock, very nice. AGMuller's card stock is also great, LS is okay (I thought that my recent purchase of the Liber T had too-thin card stock), I think the best cards I have are the Greenwood, old-style Shining Woman (vs. S. Tribe, which is Llewellyn), old-style Hanson Roberts, etc. The Greenwood really rocks - I think that deck will last forever (and well it should, given how much they are going for these days!)
Many folks rave about the MRP cardstock, but I don't enjoy shuffling my BBC 2nd edition deck. I riffle shuffle, and the deck is too "whippy" for my taste, the cards are too bendy to riffle well. As I've used that deck more and more I find that the cards aren't sticking together as much (I guess I should've gotten some fanning powder, eh Umbrae?), and I'm getting used to shuffling it. I know that it will last forever because MRP uses excellent card stock, but it does feel weird to shuffle that deck. Meow!