The director of Romeo and Juliet said that he has about six people aged 18 to 21 from which to choose a Romeo. That leaves me out. His partner is 24, so I guess she's out of the running for Juliet as well, since Juliet is to be about 18. Oh well - we'll see how it goes. I think Mercutio is out too, as the guy I would pick as the main comic/stand-out character for any Shakespeare will be auditioning.
That leaves me in the running for Benvolio, Tybalt, Paris (I'd rather not), or one of several smaller parts. I'd quite like to play Sampson - only one small scene, but great lines. Could probably double and throw in the Chorus, a page, a citizen, etc.