San Andreas was the last and most-advanced GTA before things got too complicated, just in terms of gameplay. I didn't want to be bothered on the cellphone and do unwanted mini-games with Niko Bellic's brother and stuff. I wanted to be a bad dude with a bunch of guns, doing my thing, and San Andreas delivered. After that, Saint's Row games delivered, but those games are more light-hearted than GTA.