I also agree with PhillyActor and TouchMe to an extent. The professionalism factor has a LOT to do with how you are cast and seen in roles.
Generally, not to be negative, but if you are pretty/handsome, young and Caucasian you have a pretty good chance of getting cast in romantic leads in a professional setting. If you know you are hot, and have the talent to back it up, you should definitely go out for those kind of roles while you can, it will be your bread and butter. And even that is not guaranteed all the time. Most likely all the pretty talented people are cast in the ensemble of musical shows. So get used to that too.
Character actors....like myself, might have to wait a while before they can get work in the roles that they want to play. That's the reality. There are roles that I can play, and have realistically played despite my age, but there is/was a LOT of comepetition for it.
Audra is an excellent example of defying odds against your type. Who would have ever thought to have cast her as Clara in Passion, or the Beggar Woman in Sweeney? That was the biggest shock for me. Brian Stokes Mitchell is another example too. I am ALL about the breaking the color barrier and shooting for the roles that you want, but like it was mentioned before, you have to know your limits, and when not to overstay your welcome.
Do you really want to waste what little time, you have to audition, or even the chances of GETTING a decent audition with trying for a role that you know casting directors won't see you as? I can see if you are too young, but still the right type for a particular role, but if you know that you are the wrong ethnicity, or absolutely the wrong type, you DEFINITELY should not waste your time, and the people behind the table's time. And I am saying this from experience.
(steps off soapbox).
I have played roles that I might have been too young for, but those were for summer stock, and semi-professional theatres. I doubt I would be playing a 40 year old on Broadway. (I'm in my mid-20's.) So the level of professionalism is definitely a factor. I would do shows in stock or something that will give me the experience of playing these type of roles so that when you are the right age, you will have the experience.
Just my 2 cents.
Cheers,
The Balladeer
"Someone tell the story...Someone sing the song...."