The best, and worst thing about long exposure is the wait. From clicking the button, til it says click again, and I can check out the result, almost instant. (Bless the digital age) To waiting 1 more hour for the train to arrive so I can get the photo I want.
And some times, some times I dont even get the photo I tried to get, but that's okay. In this time and age of digital edits and manipulations, I like the illusions I can achieve with just a long shutter time and a tripod. Here's one from Hamar train station.