How do you define "best"?
For someone who doesn't want to dive a dry suit, we have almost no diving at all . . .
But if you like color, the Point Hudson jetty is covered in oranges and purples and yellow and whites and pinks. If you like nudibranchs, you'll be happy to know that the folks from Southern California swoon in ecstasy over the size of the nudis in the Sound. If you like octopuses, ours are bigger than you are. If you like muppets, you'll be happy to meet our snaggle-toothed wolf eels. If you're amused by the absurd, you'll adore the grunt sculpin. If you like macro photography, you can go crazy on our sculpins, stubby squid, candy-striped shrimp, and other vivid small critters.
If you like wrecks, we have 'em shallow and we have 'em deep. Airplanes, barges, ferries, sailboats and cars . . . sunk on purpose, or with dramatic stories behind their watery ends. Where else can you dive a wreck that was filled with treasure . . . in the form of canned salmon!
And the best part of Puget Sound diving, and the thing that elevates it above Monterey, or the Channel Islands, or even Vancouver Island for me, is that we don't have surf, and we have shore diving everywhere. Any day that the weather would make you want to be outside at all, you can dive here. The viz may be crummy, or you may have to thaw your gear, but we can go diving. And there is a LOT to be said for that.