dulse was the first one i tried, and i got such a good hit i ate the whole packet!
then i got turned on to sushi nori, which we'd roll with all sorts of things like salads, not just rice and wasabi.
then i tried a wakame/tomato salad, and that was a knockout. then i started feeling when i didn't eat them for a while, so started using regularly.
the fried crispy kombu, that is by far the best though... hiziki is the strongest flavour, i wouldn't start with that one, though there are some great recipes for it. if you soak seaweed, pour the water onto your animal's food, or on plants.
agar-agar is useful for gels.
i go to an ethnic food shop too, we get shitake mushrooms there at about a sixth of the price of the health food store. ~"When an inner situation is not made conscious, it appears outside as fate." Karl Jung~