So yeah: a lot of people are interested in moving jobs some day. There's nothing wrong with that. But here's a tip: when someone you barely know asks you--just conversationally--how you like your job at X, your response should not be, "it's a good first job."
Maybe you've absorbed the snobbery of your grad school cohort; maybe you're afraid of your interlocutor's condescension or pity. But I swear to God: I'm not even a job-seeker, and when I hear that I still want to punch you in the face.