Just pretend I'm saying you're favorite game, that way you can get the self-righteous indignation of discovering I dislike your favorite game, while I can get that secretive 'troll thrill' from knowing I've displeased someone.
That's how these topics work, right? At least that's what I've always noticed. Few people every mention genuinely mediocre games (Or, in most cases, bad games since the topic is usually 'whats the worst') because we've forgotten those since they were so mediocre, they mention games they know are popular but didn't themselves love, that way they can get a reaction.
But maybe I'm reading too much into this.
You want mediocre?
Chaser
Chrome
Will Rock
Pariah
Silverfall
Infernal
Never heard of them? That's because they're mediocre. Not bad enough to hate, not good enough to be worth remembering. As much as I dislike games like Halo or Call of Duty, they're not mediocre, they're damned good at what they do. I'm just not the sort which appreciates them, but I can still see the appeal.