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I live in 中央区. I don't go to Shinjuku much. The Shinjuku station is just too complicated and I guess you know the place better than me =)

That maybe true. I found myself spent more time in Shinjuku than Causeway Bay in last few years. I hate Causeway Bay for too many people, no more shops targeting local people, too expensive and also bad air pollution. That's why I seldom went to Causeway Bay, unless 100% necessary.