While pumpkins don't last nearly as long as clay or wood, it's still a REALLY fun medium to work with as an artist. For me, it represents fall perfectly.
Pumpkin art only lasts a couple weeks at most, even using the best preservation techniques I've got. So the only way you can enjoy it year-round is by taking a picture of it. It's ephemeral and fleeting like fall. And I think that's kind of beautiful.
If you're passionate about fall and fleeting beauty, take a look at the various pumpkin styles I create.