What do you think about a picture i have shot last month on the Strip ?
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only looks too dark because you've got big ol caesars palace in the background imho. Would've been cool to have the people on the street motion blurred more, but hey. I can see what you were going for.
There are a lot of good spots in Las Vegas to take pictures. But it depends what kind of pictures you would like to take. If I can give you one advise book a room on the Strip (Planet Hollywood, Paris, Bellagio ...), with an Strip view and as high as possible. Las vegas by night is an amazing show.