Elevators... i think its worked much better in both ME and Portal with Elevators, it gave you a sense of connection between the places you were going. Although in ME2 the loading screens did actually load so quick i could never read the tips, so less waiting was alright.
Portal 2 having loading screens was pretty unnecessary seeing as most of the time loading took place after getting into an elevator.
although:
Portal 2 having loading screens was pretty unnecessary seeing as most of the time loading took place after getting into an elevator.
although:
the aperture science logo changing depending on who's in control/what period of history the test chambers are from was a nice touch