It all depends on the job type naturally - assuming you're working for a web-dev shop, most work will likely be new site launches v.s. new feature development. If you're working client side, then correct its likely module enhancement.

I think you'd be surprised how easily you can put Drupal on a resume without putting PHP.

I know a few web design firms where the "Drupal programmers" really are just the ones who just know enough about Drupal to get the things working the way the graphic designers want them. They just install the right modules and know how to configure things and where to change files to get things to display properly. They really don't know much about PHP at all.