I"ve never been a huge fan of opera.  Specifically, I'm not a fan of the singing style.  

Or it may be rebellion that traces back to college.  My classically trained voice coaches refused to work with me on musical theatre pieces.  (And I was a theatre major.)  Oh, noooooo...Musical theatre is base!  Opera is grand!  If you want to study with me, you will sing arias!  

There are worse fates in life than being forced to sing Puccini arias.  