As an undergraduate, I studied philosophy and the field in which I'm pursuing a PhD right now. Though I had passion for both fields, I chose this field because I did better in this field than I did in philosophy, and the job market situation seemed slightly better here.
But I figured I still want to be in touch with philosophy, so I've been taking graduate philosophy courses for credit. The problem is, I've found these courses more interesting than the field I'm currently in. It's not that I'm entirely disinterested in my own field, but I prefer the method or approach taken in the philosophy department to those in my own field. Good news is that there's a philosophy professor who's interested in my project and I'm planning to work with her (she's officially affiliated with my dept). I'm also trying to have another philosophy professor join my committee so that a half of my committee will be from the philosophy department. And, of course, my dissertation will encompass both fields.
That said, in the future, I want to apply for jobs in both departments. But I don't know how realistic this hope is. I'm not talking about how hard it is to get a TT job, as I've heard nightmare stories numerous times since when I was an undergraduate student. Rather, I wonder if not having a degree from the phil dept will become a massive hurdle even if I work closely with the philosophy department. If I have to choose either, I honestly would prefer a philosophy department, but I guess I realized it too late.
Thanks in advance!