Yeah I mean Vice City and GTA3. I remember just going completely bonkers in Vice City, I could never emulate that madness in GTAIV.
They have this amazing sandbox in GTAIV, but it feels you can only just sit and watch it... You must not touch!
I was insanely disappointed when I found out there was no flying car cheat, no planes, no keys to the city mode... Just such a waste of money invested in an amazing engine really.
Sure you can get these things in mods, but they aren't supported, and usually crash the game.
The developers behind games like Saints Row 2 and 3 have the right idea.