Objectively speaking, it's a massive improvement over Vice City. The mission variety is massive. Although not great, aiming is much better. I loved the Los Santos map of SA more than that of GTA V. Side stuff such as gaining weight or muscling up also give it a great taste.

However, the more I proceed in this game, the more I hate it as you progress in the story, the missions get more and more ridiculous and they don't even make sense.