I think that last year's Perl conference, between Simon's Perl internals course and Tom's Advanced Perl one, have pushed me into a higher quantum state as far as Perl goes.
Before the conference, I was perfectly happy to code without really understanding closures or glob assignments, and my grasp of Perl internals was on the order of "Ugh. Big juju."
After the conference, though, I found myself using closures and glob assignments and callbacks in the same new module, wich heretofore had a little bit of object-oriented stuff in it as its most advanced feature, and thinking to myself, "Of course. This is much the simplest way to attack the problem."
Now I'm actually creating something I think is good enough to send to CPAN, I'm learning Perl/Tk because I need to hook this module into a visual debugger, digging into Devel::Peek because I need to, and I'm actually feeling like this is all no more complex than what I was doing before I started all this new stuff. A big thanks to them both.