Yeah, our stutter tends to vary depending on what we do. On our own, we typically don't experience stutter - although it's certainly possible. Again, it depends on what we're doing. E.g. try recording yourself and see what happens - and then try recording something that you're going to play back to someone you know. Your results will likely be different. The point to take away is that variance potential is inherent to stutter, and the things we do affect us differently.