There is never such a thing as learning too much. We can always delve deeper, and in fact we should!
I love languages (I speak French and Spanish and have been studying Russian) and accents; so one definite dream role would be being able to combine those elements into a character.
I must say I'm not 100% fluent in Sign Language, but I am working on it!
Being a martial artist for many years, it has become a bit of an obsession of mine to bring that part of my life to the screen.