From S/V YOLO:

If you are a cruiser, then you know that watching other boats come into anchor can be a pretty fun spectator sport. Particularly when you have been securely set for a day or two, reading a book in the cockpit, perhaps a drink in hand. We have watched numerous boats make 3 or 4 attempts to set their own hooks. We never have to reset. EVER! I really don’t think this is lack of skill on their part. It is simply the anchor. All anchors are NOT equal.