In an office full of Retina MacBooks, I love my ThinkPad X220 (and this is my fourth ThinkPad in a row, spanning both Lenovo and IBM eras). It's not a flashy machine, but it's got a bunch of non-mainstream features that are devoted to getting things done, at which they excel: - Nub pointer? I love it. Full mouse control without moving my hands significantly away from where they were on the keyboard anyways. My X220 h…
I agree with all your points. The bricks are pretty much universally interchangeable, except for W models (powerful workstation series, they have a large heavy brick with a higher current rating, which you cannot use with other series).
Repair manuals are fantastic. Two weeks ago the fan in my mother's T500 has become noisy. The laptop had been running non-stop for 3 years and the fan needed more lubrication. Using a repair manual that I downloaded from lenovo.com, I could do this in an afternoon, having had no prior experience of opening up (let alone fixing) a laptop of any kind (although I do have an experience of building my own desktops).
The knob and the thinklight are the best things since sliced bread.
BTW, you can turn off the trackpad completely in the BIOS setup utility. That's what I did on my X220 :)