Uhhh...Canabalt.
Very average. Although actually, I might be using that to mean 'boring'. So that would make it bad, not average...
Hard to think of one.
Most Tower Defence games qualify. The few that are original (Dungeon Defender, for instance), often get lost in the mire with the rest.
As for a specific game...Micro Machines v3, if you twist my arm. Loved the original Micro Machines on Sega Mega Drive (you could JUMP! In a CAR! To my mind, at the time, that was awe-inspiring). MMv3 was just meh.
I'd say FFXII too but I think that can be filed under 'boring/bad', too.