True, all the crap that we have to deal with does make you question why you're doing it - thought of another one, often, you're working on some very small piece of a feature you don't care about, working for months on end.

Still, for me, at some level always enjoy the act of building something that needs to function in the demanding environment of the digital world (especially, high-volume applications). Yeah, it requires you to use your experience and training to solve difficult problems and produce a real result. For me at least, this typically enough to keep me going:)