I only kept track of my time on one quilt I made as a wedding gift --a king sized sampler that had dozens of flowers appliqued onto it. At the time, I could not afford to send it out to be long-armed, so I quilted it by hand. In the end, I spent over 500 hours on it.
After that, I decided to never again keep track of the time I spend quilting, and instead just enjoy the process.