I'm probably biased by my Dads '96 528i SE, he's had it from new, its way over 250k miles now and I could only describe it as being in pristine condition!
Prior to his e39 he had two e34's from new, an 1-6 530i and a 530i V8 (H & L reg respectively) both proved troublesome around the 130k miles mark with the V8 car suffering from the dreaded bore wear issue.
I recall topping up the e34's weekly as both used oil as the miles ticked by yet despite his current e39's mileage, his still uses barely any oil between services.
Despite him occasionally having "New" 5's and Merc's as loan cars from time to time, he has no desire to replace it which says a lot for it I think.
Don't get me wrong,my Dad could well replace it easily, money is not the issue, he still loves to drive it (as do I!) and has decided that he's going to run it until it breaks - And thats after he had an F10 for a weekend!
I can't think of higher praise than that!