The bottom line is that the core Nintendo fan doesn't buy anything that isn't made by Nintendo, so why bother developing for the systems? And Nintendo fans seem to have some sort of problem with first-person games or anything with a plotline more mature than your average saturday-morning cartoon.*
*Slight exaggeration. But seriously, when you see what I see--where the Nintendo kiddies prefer the childish ham-fisted anime-style writing of Metroid Other M to the mature, thoughtful discovery and exploration-based narrative of Western-produced Metroid Prime games... Well, clearly Nintendo supporters aren't interested in mature Western gaming anyway. How many of you bought Eternal Darkness? Compared to the Japanesey games on the GameCube, seems like it was just me.
Grand Theft Auto: Chinatown Wars and Dead Space Extraction were Western-developer helmed games, but Nintendo fanboys couldn't find enough to hate in those gems. I know this because I get flamed with "why those highly rated titles actually suck" every time I mention them on here.
