I've left jobs before because the description and the interviews made it seem fascinating; but I mastered the stack in a couple weeks and became VERY bored.

Somehow; the less savvy the interviewers are the more interesting the work is and its usually bad more often than good; but when it's good It's fantastic and with usually mediocre pay.

Also it's somehow always a mixed bag when the interviewers are more experienced than I because you would think that it would be great, but it's never as good as the previous category; decent but not good. But they usually pay the most so that mostly makes up for it.