Baran-
I switched to circle hooks about 2 years ago - I was skeptical at first because of the narrow gap, but I think (hope) my hook-up rate has actually increased with these hooks. On top of that, the fish are better hooked, and I personally think they hold bait better (especially clams). My only caution is this: if you rely on a long shank to protect your line from toothy blues, circle hooks offer little protection - I'd highly reccomend a wire leader (which you may [and should] use already). Other than that, they're great. TIP: when fishing fresh clams in the surf on circle hooks, bury the whole hook inside the body of the clam, and then make a few wraps of heavy duty white cotton thread around the body. The hook becomes (and stays) concealed completely and the bait will take more abuse.
-Rockfish