Yes. I honestly regret buying Shadow of the Colossus. It was a boring game. Only things I like in SotC is the sceneries/landscape and graphics. For me it's more fun just walking around than fighting colossi. SotC's graphics is one of the best IMO. :)
I also kinda regret buying God of War. For me it's like a Onimusha clone. Kill enemies then absorb souls to upgrade weapons and refill health. Gameplay is way too linear. Only thing I like in God of War is the story.