The main problem of hobbies is that I typically don't think they matter enough to deserve space on the single page of your resume. I'm not even a decade into my career and I'm already considering cutting my college stuff down to "COLLEGE NAME YEARS ATTENDED DEGREE GPA HONORS" in a single crammed line. I think I'd put down my in-major GPA and emphasis courses before I'd put down that I like video games and my cats (.....which let's be real, you can probably just assume is in the hobbies for software engineers).