i read a question earlier (this may not be relevant anymore), it was about playing ages in songs/monologues for auditions.
Basically if you are auditioning for a Drama College, they want to see who you can play NOW. Not who you would be really good at playing in thirty or so years cus you were good at it in high school.
What use is that when you finish and want work?
You will never get a 54 (or 34 for that matter)year olds part at only 21/22 etc, because funnily enough, they already have plenty of people who ARE 54.
They are looking for your potential to get a job when you leave, you're not helping yourself if you play something you simply are'nt.
If your style is mature then go for a song meant for someone no older than 30.
I still say take a monologue close to your own age.
Take care all
xx
If you keep your goal in sight,
You can climb to any height.
Everybody's got the right to their dreams...