No disrespect, but this is quite a stupid thread.
Of course I'm so glad that San Andreas existed. I had NEVER played a game like it, it was one huge, spectacular and fun game on many levels. Vice City is my favorite GTA, but this comes in at a very close second.
If anything SA should be the main motivation for Rockstar to set their bar and standards even higher for the GTA games that came after it. They kind of failed in doing that with GTA IV. In the case of GTA V ? I cannot say just yet, I've not yet completed it, I'm very far into the game. And so far, I really do think that Rockstar could have done a much better job with V, even though I like V better than IV. That is Rockstar's fault, not SA fans.
And I think the OP is wrong about why there was a lot of hate for IV. The reason why IV got so much hate and dislike was not simply down to the omission of simple SA-style features like tattoos, haircuts, muscles etc. No, not at all. IV got slated a lot, simply because it was quite limited and lacking in variation in many areas. IV's missions were a bit too repetitive, it was mostly hitman-related, go there and kill this and that person. Began to wear thin after a while. IV did not have enough fun and interesting side missions and activities, there was not really much to spend your money on, you could not buy, own or manage assets, and there was hardly any random crime or action in the streets. SA had all these missing things, something which ensured it would still remain popular over IV.