Going back to the times of the MegaDrive, Road Rash was fucking amazing ! Then the N64 you can't look past GoldenEye The oringinal Metal Gear for the PS1 was quality also. San Andreas was my favourite on the PS2. Out of the next gen consoles, my favourite has been COD 4 the campaign wasn't that great but for the online gaming it is my favourite ever. I managed to rack up something ridiculious like 30 days of gameplay online It was the first FPS since GoldenEye that I actually really liked. Special mentions to the Assassins Creed games and also to FM, despite the fact the fact it's limited in what you can do, FM can keep me occupied for hours on end. I know you asked for the one favourite but I couldn't decide so there's one for all the consoles I've had