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If I'm being harsh, then I'd have to say that I see way too many photos without a subject. That doesn't necessarily mean a person, but something that draws attention or focus and adds visual interest. It's as if you're close, but you're just not quite getting the moment. The last shot is a good example. I know you probably wanted to try that technique, but even with an interesting technique, the photo has to be interesting on its own. Otherwise its just a photo for technique's sake.