I like both depending on context. CAD and gaming, definitely a mouse. But for general use I like the trackpad better. Scrolling is smoother and Apple's multitou

I like both depending on context. CAD and gaming, definitely a mouse. But for general use I like the trackpad better. Scrolling is smoother and Apple's multitouch gestures for window/desktop management are really fast and natural. Once upon a time I had an 8 button mouse with several of the buttons bound to Exposé functions, but I don't think I'd go back to that from Apple's trackpads.