I've been offered a position in the lab I worked in as an undergrad, starting this spring upon graduation. One of the perks of my position would be that I get to register for 5 credits (~one class) per quarter for free.
Let's say I want to take advantage of this, and my boss in the lab is willing. I see I have three options to take classes this way:
I could take more classes in my major (linguistics) that I didn't take before I graduated.
I could take classes that would prepare me for the sort of work I want to do in graduate school (closer to psychology than theoretical linguistics) beyond what I already have done and learn in the lab.
I could take entirely unrelated classes I have interests in but didn't take in undergrad. For me, I would probably take a language class. It keeps me sane, and they're often scheduled early in the day so I would miss less work.
All else being equal, how would a graduate admissions committee look on me for choosing each of these paths for a year or two before I apply for grad school? I imagine (2) would be best, but there's still lots of interesting classes in (1) and (3) that are hard to pass up.
I do want to say I'm not just doing this to make my grad school apps look better. There a lot of undergrad classes I'd love to take in both options (1) and (2), and like I said, learning a language keeps me sane, but I thought I'd get all the variables before I did anything.