Every person has a different reason to like them or not. I can speak of my case: I work making software in one of the supposed "right ways" on a daily basis. I also like getting together with buddies or new people, and code something exciting that keeps you up until the wee hours with some good food and drinks.

I don't go with the expectations of having a full blown product ready for market release in 24 hours. I certainly know I might learn something new from experimenting or from others, come out with a good prototype, and simply be back on sunday very happy after doing something really fun.

Also don't underestimate some engineers abilities. I've seen guys crank out things in days that would take months to others.