I'm lucky enough to have the DOC, SF, and Whaleshark. I'd put the SF at #3 of them. It's a great knife, and I have nothing bad to say about it. I just enjoy the other 2 more. I think maybe I find the looks a bit on the gimmicky side. As for the DOC and W/S, they are very different "feeling" knives. While the action and fit 'n finish are pretty much the same (extremely good) the soul is different. The W/S is more sculpted with flowing lines. It feels great in the hand, and it's actually quite a bit smaller than the DOC. The DOC is more of an animal - big, heavy with lots of heft in the Stider-esque handle. If you told me I could only have one I'd choose the W/S. It's more versatile and I love the shape. Either way you can't go wrong.