It was a brand new GTA game with a new engine with more realistics physics, which the previous GTA games (III, Vice City and San Andreas) didn't. And Liberty City was very impressive by the time. And for the first time, you didn't have to become a rich powerful guy but just do your regular crimes.
But yeah, it was overrated. I enjoyed the game until one of my friend told me "I don't enjoy it as much as you do, most of the missions are you go somewhere to kill a bunch of people and you take someone to somewhere", and it was true. Only GTA game I couldn't finish.
"Quagmire, are you the type of guy who takes 'no' for an answer ?"
"My lawyer doesn't allow me to answer that question"
PSN ID: skmblake | Feel free to add me