Only good part about zero switches cars if you are trading for it - you can be sure, that no upgrades are installed. Especially no upgrades that can't be removed, as a chassis one, engine etc
Other than that, i think it's the matter of preferences. Some people don't care about mileage, at least if it's not above 1k miles or so, some people like 0 mile cars, some like a "virgin" cars, 0 switches/0miles. >_>
0 mile cars with oil change highier the max BHP...if used even less then 1 mile the car wont ever reach its max stock BHP
Not another one.
I always try to answer the question instead of just saying "Use the Search..." but in this case a look at the first couple of forum pages would have turned up 1,343,532* threads all asking this.
*Number may be slightly exaggerated