Personally, I have Sonic Heroes as my worst. The flow is awful. They screwed Tails. And Knuckles conformed with the rest. The replay value is out the window. Anyone who would want to do those endless challenges likes the gameplay system in the first place.
Shadow the Hedgehog was awesome. The gameplay was cool, though another game with guns defidently would've been way overdoing it. Missions were oh so cool, or at least, the ones which weren't linear. The Doom is my personal favorite. Multiplayer was cool, they just confined you to three stages. The only thing about that game that was appalling was the story. We all know Black Doom didn't make Shadow. And the laser inside the Ark was never meant to destroy the Black Comet. However, going totally evil then going rogue at the last second was fun.
Anyways, topic continue.