Personally, I played all parts of GTA except the very first; this series of games has always attracted me with something, I still don’t know why. I thought about this a lot, compared it with other games similar to this one, but none of them stand even close to this series. It was probably attractive because of its obscurity: there would always be something to do, something to look for, something to do. That's what Skyrim attracts too. Even in addition to multiplayer, GTA can be played endlessly. What about GTA V, I personally waited for it for a long time and my expectations were justified, of course, it could have been done even better, but what we have in the end is 10 out of 10. Although, we could have worked on it more, a lot more you can do it in it.
In the end, for me personally, GTA is one of the best series of games with an open world and limitless possibilities, I hope RockStar will continue to surprise us.
P.S The budget of the game is also surprising, it surpassed all Hollywood blockbusters. Keep it up Rockstar!