I think an accent comes from moving from a less feature-rich language to a more feature-rich language, and not using the new features.
While Perl is a nice wide language it still has it's restrictions, corners and peculiar mind set. I know I have to unbend my mind from Perl when I wander off into other languages. Some examples of my Perl accent include:
- I keep forgetting about meta-classes when I amble over to Python or CLOS.
- I have to remind myself that macros are useful in Lisp
- I have an awful temptation to sling everything into the local equivalent of a hash even when more appropriate data structures are available.
- Since currying is such a pain in Perl I tend to forget to use it in languages that support it nicely.