It's not a 'worst of these bad games' poll.
I don't follow. :
This is just as much a "least-best" poll as a "worst" post. Picking a game doesn't mean it's bad.
But what the hell is wrong with Kato & Ken?
What isn't wrong with that trainwreck? It fails at everything, on every level, in every way.
I won't get into this or more so JJ & Jeff's awesomeness again. But even if it wasn't the great platformer that it is, I'd take a not-so-great platformer over a puzzle game in most cases, especially something I'm that much less likely to play than a more popular/western-friendly kind of puzzler.
Ask most people here and they'll say they pass up Shanghai not because it's not a good mahjong game, it's that it's a mahjong game at all.