Used to use Bike Journal, which did nothing but make me feel inadequate about all aspects of my riding (not far enough, fast enough, enough hills), so I quit. It was liberating.
The only thing I use now is my bike computer, or I should say, computers, as I have 2 bikes. I look at my total mileage for each ride and cumulative mileage, as well as cadence, which let's me know if something is "off." I only look at average speed for certain kinds of rides, mostly, I don't anymore. I found that by only looking every few rides, I am often pleasantly surprised, instead of always upset.
Just me. I am not into stats, so I really do go by how I feel.