Like another user mentioned: the trackpad. Particularly the software aspect of it.
I have a personal 2012 macbook air and a lenovo thinkpad whatever from work. If I have to use the trackpad on windows I'm miserable. It's just so bad, the OS itself isn't made with it in mind: things like dragging and click-holding don't work anywhere near as well as it does on the macbook, the multi finger gestures are a miserable experience; I spend most of my time frustrated that I don't have a mouse. Compare it to the macbook: I do have a magic mouse somewhere but I haven't used in years; it offers me no better experience than that amazing trackpad support does.
This isn't even related to trackpad hardware because the experience was equally bad when I ran windows on the macbook using bootcamp. The Windows trackpad experience is just years behind OSX.
edit: as a related sidenote, I'm planning on dumping the macbook next year becase it's aging (4gb ram doesn't cut anymore). I'm planning on replacing it with a MS Surface; I found that touchscreen+pen are a suitable replacement for the macbook trackpad when you're on the go for my type of usage.
I have a personal 2012 macbook air and a lenovo thinkpad whatever from work. If I have to use the trackpad on windows I'm miserable. It's just so bad, the OS itself isn't made with it in mind: things like dragging and click-holding don't work anywhere near as well as it does on the macbook, the multi finger gestures are a miserable experience; I spend most of my time frustrated that I don't have a mouse. Compare it to the macbook: I do have a magic mouse somewhere but I haven't used in years; it offers me no better experience than that amazing trackpad support does.
This isn't even related to trackpad hardware because the experience was equally bad when I ran windows on the macbook using bootcamp. The Windows trackpad experience is just years behind OSX.
edit: as a related sidenote, I'm planning on dumping the macbook next year becase it's aging (4gb ram doesn't cut anymore). I'm planning on replacing it with a MS Surface; I found that touchscreen+pen are a suitable replacement for the macbook trackpad when you're on the go for my type of usage.