I have to agree with Abigail-II on this one. In my current job I use perl, VB, Java, C++, ksh, and Cobol (yes even Cobol) depending on the project. I use perl more then anything at the moment, but will occasionally go for weeks or a month without perl. Knowing perl is great, knowing serveral other languages to diversify your resume is better. Of course, if you manage to convince your boss that perl is the best tool for every job, good for you :)