Red faction.
although i really enjoyed Guerrilla, i wish they had gone back to a first person perspective for Armageddon, and ditch all those futuristic weapons/gadgets, i prefer conventional guns and explosives. I really enjoyed RF 1, it was the first game i ever played with destructible terrain. I also liked the style of it, the architecture, the weapons, it had a certain look and feel to it that its sequels lacked, RF2, although having cool boxart, just wasn't as good as RF 1, the environmental destruction was basically gone, and it just wasn't as memorable.
Gran Turismo.
GT2 was several kinds of awesome, GT3, with at the time, awesome PS2 graphics was just as awesome, GT4 was slightly less awesome, it was good, and added to the much lacking car list of GT3, but didn't deliver much else that was new.
and im glad i decided not to pull the trigger on a PS3 for GT5, IN MY OPINION it turned out to not be the game i was wanting/expecting it to be. basically a long delayed RErelease of GT4 with a 200ish car addon, graphics bump, and most of the classic tracks taken out. although i hear that the physics were greatly improved, so i guess they got one thing right.
Im glad i skipped that one, but i eagerly await news on GT6. I really hope GT6 turns out to be good. as a fan of the old GT games i really really want it to be good, and if it is the game i want it to be ( and the game it needs to be) I will buy it. put in all he tracks from all the previous GT games, all the cars from the previous GT games ( all in equal detail with cockpits), put in a menu similar to GT2, and a rockin sound track like GT2's + a even better car physics than GT5, and you've got the game that is required to make the GT series legendary again.