I started my career as a mainframe operating systems developer for IBM, programming in IBM 370 Assembler H. Since then I've worked in a variety of industries and an even wider variety of computer languages - OS development, Compiler development, Telecom, Financial Services, Wholesale/Logistics, Social Media, Web Development, programming in Assembler, Basic, C, C++, C#, COBOL, CSS, Fortran, HTML, Javascript, Java J2SE, Java J2EE, Pascal, Perl, Python, PHP, Rexx, TCL and others I can't remember anymore. Too many OSes, and databases, to count.
For the last 3 years I have been a freelance website developer, working primarily but not exclusively with Drupal on the LAMP stack. I work on both the front- and the back- ends, doing custom theming and custom Drupal module development, full site building/configuration/maintenance, and even site hosting on Ubuntu Linux servers I manage.
Probably because I've learned (and forgotten) so many systems and languages, I still come to PHP, and to Drupal, as a bit of an alien - I can "say" whatever I want to in them, but I'm not yet as fluent in their idioms as I'd like.