I like the water motion, but I'm not sure about the inclusion of the people. It does need some kind of stationary object, though, so I'm not sure how to fix that.
I think this could've been a great shot, if there was just a little context to what the two people were looking out at. Maybe a horizon or something - I don't know.
The focused geometric juxtaposed with the blurred chaotic. Great effect. Nice subtle colours in the water too. The boat part is not quite boat enough, if you know what I mean. But, no doubt, this was not an easy shot to compose.
Very cool. Perfectly sharp foreground really sets off the flowing water. Where was this? I've been on cruises, and can't imagine water looking like this.