Location.
This is a person-by-person basis. For me, living in the suburbs I have to take the Metra into work and therefore am left to the mercy of the Metra Gods for getting in without complications. It's especially annoying when complications occur while heading home if you have evening plans. Besides that, the office is literally across the street from the train station so no complains once downtown.
As for the office and work itself, I don't really have any gripes. Yes, at times the work is monotonous and you have to work overtime to get important projects done, but that applies everywhere. Thankfully if you run into an issue there's usually someone around or someone you can call to help out.