Some days you don't like your dissertation (actually, this goes for just about any kind of writing...) You read it, and you think: "What the hell am I even talking about?" No one is immune.
See, a dissertation is like a baseball season. It's long, and your feelings about it at any given moment are not indicative of how you will feel at the end of it. Some days you feel great about it. Some days you hate it. Both of these extremes are based on limited data sets. Both of these feelings are essentially wrong.
So, yesterday when my Pirates won their home opener, I was pretty happy. Zach Duke pitched a gem, and Freddy Sanchez was knocking the ball all over the yard. But I also knew that it was one game out of 162. Duke will return to earth...as will the rest of the team. Getting too high or low is a mistake. Likewise, yesterday when I disliked my dissertation, I chalked it up to a bad day. I set it aside.