What can I write? GTA 5 is truly a masterpiece. A good open world (which is really alive in a single company), the presence of multiplayer (although if you play alone, you will get tired of it after 100 hours) and of course a really large number of vehicles... And the most important plus of the game is the game for 3 players characters. Lately, this has been a really original idea (which has already been plagiarized and inserted into Kal o Bloat).
But this game also has its downsides. Small map bugs, boring open world in multiplayer. That's all.
Bottom line: Rockstar Games know how to make masterpieces.