Hmmm... I'm really interested in cooking and national specialities (and, of course, i love eating =D). So I'd lov to learn something as well as sharing my knowledge.
I also LOVE walking through foreign cities (best would be with my LOMO camera), trying to discover the speciality of it.
Tourist-spots and 'typically sightseeing' is something dreadful for me. I am not the biggest fan of huge groups or masses of people, you'll rather find me in a park or somewhere else, lying in the grass/sitting on stairs or on the ground, with a book or a magazine in my hands.
Hiking through the nature and being on top of a mountain is also something that makes my day.
I'm autonomous, so don't worry: I'd love to spend time with my host and talk/party/do any activity, but of course you don't have to entertain me.
I love conversations becoming more and more profoundly. But otherwise, give me some good music and I start dancing...