haha, I would like that job too, Selmo! Of course, I'd have to wait till I was of age...
Seriously, I would be director of parks and public gardens of the Shire (If there wasn't that position, I'd make it up). Or a server at the Green Dragon. My fantasy job or activity would be traveling ME with Legolas and Gimli, or princess of Gondor, or shieldmaiden of Rohan. I allways did like horses...
But most likely of all of the above, I would be the very first librarian of Hobbiton. Most likely the last, but oh well....