Sorry folks, but I virtually DESPISE smugmug. And all of the other "welcome to small-sized pictures and unwieldy interfaces" sites that are similar to smugmug.
I could care less about "me" as a "user" -- I'm talking about "ease of use" for the folks who visit my galleries.
With PBase, you just select the size of picture you like, and PBase remembers it, and you just go forth and browse pictures. If you want to switch to another size, it's quick and easy, and once again you're just straight on your way.
OH, FOR CRYING OUT STINKING LOUD when it comes to smugmug and its "open a different-sized picture in its own window which doesn't even STINKING TRY to match the dimensions of the picture" interface. BLEAH!!
Please, spare me from "buy this photo" and "shopping carts" and all that insanity -- just let me browse through the pictures without all that fuss and bother. Which is exactly what PBase does -- it's simple and elegant. Wonderful!
And, I'm more than happy with PBase when it comes to "my" needs for posting pictures and deciding how they'll be displayed. Yes, PBase has had a few "growing pains" over the years, but for the most part it has been completely reliable and plenty fast to display galleries and images.
Hehehe, now go ahead and start with the "please tell us how you REALLY feel about smugmug" comments.

I know we all have different attitudes toward this stuff, but I'm just completely happy with PBase, and I usually wind up virtually yelling at my monitor whenever I have to fight with smugmug to see anything other than "small" sized pictures.
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Tom Hoots
My PBase galleries:
http://www.pbase.com/thoots