I'd second Lunar, honestly both SSSC and EBC. Great characters, pretty forgettable plots. I also find Breath of Fire falls into this category for me. Great cast of characters, but the plots are either ho-hum or kind of crappy though there are exceptions.

I also feel this way about FFIV and VIII. Even giving the games the benefit of historical relevance and tech, their stories are cheesy but the characters keep me coming back to them.