Funny that, I thought it was the worst mainline 3D GTA of them all. The physics went against the gameplay making in not fun, and realistic destruction and the likes didn't really cover for it. They also removed shitttons of content and variety from San Andreas to make the transition to next-gen. Plus they delivered one of the most boring worlds with some kinda annoying main characters that just didn't have the charm of CJ and his bros or the trio of protagonists from V. I don't think I'll ever play IV again, it bored me quicker than any other 3D GTA even back then, and it aged quite bad. V just blew it out of the water completely, making IV look like a prototype in comparison. IV's technical achievements can't hide the fact that, to me, none of the story, the worldbuilding, the gameplay was interesting enough to stick around for long.