Survivor is the best simply because it was the first. Well, of course you could say that technically it wasn't, because of shows like Real World, Cops, etc. But it was the first of the game show reality shows, which is really a seperate genre (to me) than the general reality shows that don't really have a competition element (such as Dirty Jobs, Real World, Cops, etc.). Survivor revolutionized television in a way that Big Brother, American Idol, The Bachelor, and other reality game shows did not. I've mentioned before that I would not call them reality shows (stupid misleading name) but instead "adventure game shows" or "dramatic game shows" or some such title.
Anyway, Survivor may not have been the first concept in this category, but it was the first that was well advertised, popular, and high profile. And it was actually made well, with a proper budget and amazing locations. It definitely changed the way I thought about TV.
Agree. Survivor needs separate genre from other lame cheap reality shows that usually don't live longer then 2-4 seasons. I have been a Survivor fan since first episode in Season 2(Australia) and i am looking forward to Survivor Tocantins, the upcoming eighteenth season of Thursday, February 12, and i will be watching.