At the end it's like always a matter of taste.
Some people like movies like "Resident Evil", "Transformers", "2012" or "House of the Dead". Or any Uwe Boll movie at all. And then there are people like me and some others, who feel physical pain when watching those. Story hurts, characters hurt, style hurts. It's a question of personal "standards". Some are higher, some are... not...
Seeing a Ninja next to a knight just hurts my eyes, as does seeing cavemen next to dinosaurs or watching a gay pride parade. For me it's the concentration of pure bad taste. That's all.