Diddy Kong Racing is one of those games that is hard to forget about, but some do, but once you remember it, all you can do is frantically scramble to find a way to play it. It is the best Kart Racing Game ever, and one of the best N64 games; which is impressive considering the quantity of great `64 Games.
Mario Kart 64 is considered better by many, but with DKR's level and vehicle selection and great upbeat music, it's hard to argue if you think about . MK64's only edge is it's catalogue of well known, established characters.
The one player adventure mode is like a combonation of Mario 64, and Mario Kart 64. You travel in a vivid interesting world and get to have fun with your car, hovercraft or plane. But this world is only a portal to the seemingly endless selection of levels, in which you have to complete them to move on to new levels; which makes Mario Kart's one player mode seem boring.
So if you ever see an N64 at a yardsale, of online, buy it, and while you're at it, buy a copy of Diddy Kong Racing, It'll be the most fun you had in years.