The stale jobs (and I see this) cause good thinkers to start thinking up big problems to solve. They don't like to be bored with monkey work (coding where no amazing creativity is necessary).
My last job pushed my capabilities to their limits. However my current one does not. And right now I feel like I am not learning anything, not getting better (getting worse if anything), but I try to learn from anything I can. Eventually if this job does not pick up I will be forced to leave not due to bad people, but due to boredom.
Last job I went on google news, hacker news, the daily wtf when I had down time. Here I do it because its the only way to keep sane. Damn you economic recession!
In any case next interview ask the question: "I like a challenge and chance to improve myself in things I am good or bad at and feel that my job should be something that forces me to become better than I am today. Do you think this position will challenge my abilities to their limit, and I don't mean can I do a 10 day project in 5?"