Some pasta shapes are limited to a particular region or town in Italy, or produced by an individual pasta maker, so these may not be available in the US.
My two favorite pasta shapes are campanelle ("little bells") and orecchiette. I really like the ruffled edges of the campanelle, and find it a very good vessel for sauce. Orecchiette is more of a texture thing for me - I love feeling the little suction cup on my tongue. I also generally prefer linguine and tagliatelle over spaghetti and angel hair - I just like the wide, flat texture. I've never had bucatini, but am interested in trying it - it's hollow spaghetti tubes, which sounds fun!
How about you? What are your favorite pasta shapes and why?
(Image: Kathryn Hill)