Its tradition to like the game before the current GTA. GTA IV was HATED to death just like V on these forums and there were mass complaints at how SA was a much better game and im sure SA suffered this with VC as well.
In short nostalgia is more powerful then any improvement. GTA V added 3 protags, weapon customization, a huge map with a lot of variety, great car modding, improved shooting, better movement, a massive range of vehicles, great underwater world, tons more activities, improved writing, better guns, better police ai and system and so much more oh and i'm not even going to mention GTA Online and how it slaughters IV's online.
IV was a great game and i will be returning to it some time soon but V is definitely a better game when you look at everything. I think Liberty City was the better city because we got to meet more people as Niko didn't work for himself or forced to work for the government. Also the game's shorter at the request of fans, so we can only look to ourselves for blame there.
When it comes to the Assassin's Creed series, people like Assassin's Creed 2 more than the first one.
That nostalgic argument is still lame.
AC1 wasnt very good.... AC2 was. People like AC2 more then AC3.
And the only thing going for IV right now is its great city, the story wasn't exactly all that good but GTA isn't really known for that.
By no means do I base the quality of games solely on reviews, but since when did an 81 out of 100 mean a game isn't good? That's what it got on metacritic.
Furthermore, it was good enough to warrant a sequel.
AC 1 was very repetitive though, even UBI argee that many parts of the game felt like the same thing over and over. It wasn't a bad game but it needed many improvements.
I think AC 1 was a better challenge though. Also GTA IV was definitely more of a achievement for rockstar since they started from scratch and it didn't have a chance to include everything GTA V has ( it was going to have New York's surrounding area at first and the city was going to be bigger, but had to sadly be cut.)
People should be happy GTA V is a much different game to IV, it gives us reason to return to older games.