I've owned two MBPs and a MBA (long stories) in the last two years. T-magsafe -> L-magsafe -> back to the new thin T-magsafe. The T-magsafe annoys me in that it's harder to use in my lap, but it's vastly superior in the reasons I like it: it keeps me from ruining my laptop and/or the female power adapter slot.
I recently acquired a Samsung Series 9 by fortune and am horrified at how the AC bit goes in the side and is already incredibly flimsy. On non-Magsafe laptops, you have the same issue, it's just that instead of disconnecting, it's ruining the internal AC adapter bit. It's annoying as all-get-out when it breaks, especially if it's out of warranty and you don't know how to use a soldering iron.