For me personally, Apple has never made a mouse I enjoy using.
Apple's mice were my main point of mockery as a die-hard DOS/Windows user. Even to this day, having finally converted into a Mac user a few years ago, I do not use Apple mice. My iMac has a "normal" multi-button Logitech mouse attached and an Apple Magic Trackpad sitting to the side for the occasional gestures (usually just multi-directional scrolling in Pixelmator).
The Magic Mouse is an innovative piece of hardware that doesn't make using a computer easier. Just like using an iPhone as an eyes-free video game controller is nearly impossible due to lack of tactile feedback, the Magic Mouse requires too much attention to handle with quick precision. And that means it's not good for gaming or work activities, limiting it to casual users only (who to this day seem confused when they don't see the expected button). You just can't beat physical buttons, not until we see what capacitive surfaces are like.