Killer7's not that bad to play. It's a lightgun game mixed with an adventure game basically. It has what I'd say would be the logical next step for lightgun games, although no one ever paid attention to it. I thought I hated it at first, but then I went back to it and decided it was awesome.
But yeah, Japanese is totally overwordy. When you have a sentence that ends up being some speech about magic and rainbows and some philosophical thing, it gets a bit annoying. Not to mention they repeat each other all the goddamn time. Things could be toned down and reworked to have much more functional meaning. Japanese relies way too much on odd metaphors that don't translate to any other language and because of that, don't need to exist if that language won't be used. Japanese is definitely extreeeeeemely hokey though. The VA's for Japanese games might be beloved icons but great actors they are not. I'll take Snow's VA (who also voiced Yuri in Tales of Vesperia) any day.
Funny note, the voices of Wakka and Kimahri in FFX are done by the voice of Bender from Futurama. He was also Migelo and Gilgamesh in FF12.
