Writing seems easy, but it's really hard - just as hard as any complex design / problem-solving job. Don't believe me? Read about Neil Gaiman's progress with his latest novel. It reminds me of some game designs I've worked on (and thanks to Mark for pointing out that what I felt was normal, and that filling a blank page is really, really tough).
I think back, a tear in the corner of my eye, to the halcyon years when I didn't know this harsh truth, and wrote as happily and joyfully as a child. Ahhh... those days of innocence are gone. (Although the results are still there for all to see, on the Thalion Webshrine. Luckily for me, that site is down for the moment.)