I recently joined the flocks of Fitbit aficionados, in hopes of discovering a better me. The learning curve has been steep with its many screens and buttons and parameters and graphs and comparisons. I've been talking to it, this slender bit of plastic, asking about my sleep and movements and habits, muttering to it when it annoys me, and staring at it as I would a new lover, waiting for intimations of love or approval. It hasn't been as forthcoming as I'd hoped.