Slow Medium Fast.
What's medium? Slow and Fast can be identified as the slowest usable, and the fastest possible, but Medium? What is it? Logarithmically halfway? Linearly?
I've noticed that in most cases, people want to use things at slow or fast, not using medium, but it's got to be there to make up the three. Medium is often too slow or too fast to be a usable medium.
Small Medium Large.
Medium feels like being short-changed.
Light Medium Dark.
Its just so grey.