Eh.. It really depends on whether or not I like the work at the job and whether or not the co-workers are pretty easy to converse with.
My last job was pretty boring, but the teacher, her aide, and the secretaries were pretty fun to be around and the day went by pretty fast even despite the pretty boring nature of my work (tutoring and acting as secretary, and I actually liked doing it too). Alternatively, one of my prior jobs with a fast food restaurant was constantly stressful with a seemingly in-human workload (for example, "season 15 crates of chicken in an hour and it's only barely possible if you work like Superman for that entire hour and guess what, this is only your first hour in the day!") and the absolutely insane co-workers riddled with their own specific personality issues did not make the job better at all. Alternatively, my first job period was back when I was an assistant custodian when I was 14 and despite its stressful nature at times, the co-workers were a blast to be around and the work was bearable if not informative at times.
I would probably gravitate to a more "in-between" answer with a job that I like that isn't completely overdemanding. But given how most jobs tend to gravitate to either extreme, I would probably pick a boring job. I find it pretty easy to pass the time even in the most dead of situations.