I didn't totally hate GTA IV but I was expecting a lot more out of it's jump to PS3, it was still fun but like you said it didn't really go anywhere. Definitely disappointing compared to San Andreas. I didn't even catch the Packie cameo, I'll look out for it when I go back and play it again from the beginning. It normally takes me a while to finish these games but this one didn't seem all that challenging and didn't last as long. Still love it though. It'd be badass to see Vercetti and CJ make an appearance. I know it'll be a long while before they make another but I can only hope they continue to outdo themselves.