I'm a strong, but not fast, rider. I like it that way. It's so much more enjoyable when you take your nose off the stem cap and look around. I know there's people who get thrills racing everywhere, and there's a time for that, but commuting isn't one of them for me. I go fast enough to where I get where I'm going, usually around 13 MPH average on my loaded MTB commuter. Anything faster than that, and I'm sweating buckets. For group rides, I'll strip the bike and ride hard to keep up and get a workout, but going to work and back is my mental "quiet" time.