I've still got a Mongoose Hilltopper that I bought in 1996. The 7-speed grip shifters are virtually falling apart. The cranks are worn as hell. The brakes squeal and provide uneven pressure, but they still stop the bike. The rear cassette is just plain ugly. And the low-end (even in 1996) Rockshox fork is spongy as can be. But it rolls. And I have too many good memories (including riding across most of Europe on it) to let it go. So it gets pulled out every summer and becomes a loaner bike for the interns in my office. Ugly as it is, it still makes me smile.