The Royal Canadian Mint for investment grade bullion. High security and standard designs. Excellent for full ounce gold and full ounce silver. Australia I have also grown to like the Perth mint for its variety: Lots of WWII stuff and lots of animals. Two of my favorites. Gold WWII stuff in 1/10 oz size and the animal stuff (Kookaburras, Kangaroos, Koalas, Spiders, Crocodiles) in 1 ounce silver size. Perfect. UK I tried to like the Royal Mint. But even though the Queen's Beasts designs are excellent, I have no desire to get 2 ounce silver bullion pieces or 1/4 ounce gold pieces. And for collecting, I can't afford full gold ounce size. So that means I'm skipping the series. I would have gladly purchased 1/10 gold pieces and 1 ounce silver pieces. US US Mint: Sorry, I just don't care for the Eagles or Buffaloes. I do love the gold Mercury and the gold JFK, but these enter a little bit more into numismatic territory with their premiums. Austrian: boring China: they use grams not ounces. No thanks. South Africa: Ok, but pretty boring. Love the Krugerrand design, but once you have a gold and silver what else is there to buy? Everybody else: they don't mint their own products, they use private mints, so they don't count for me. What do you like?