I could imagine the middle design for a casino or such, but the other two, IMO, are unattractive. The third one strikes me as hideously ugly.
Although Vancouver is saturated with concrete and green glass, which we could step back from with no problem - I think that an overall design arc is desirable in a city to give it cohesion.
Look at all the great cities of the world that are beautiful: Paris, of course, but Stockholm, Rio, San Francisco..........
They have variations of design within their major body of traditional design, but even these variations somehow complement the existing buildings.
In Vancouver, in particular, I think it would be a poor idea to put up something that is going to "compete" ferociously with the natural environment. (That's probably why the green glass syndrome began; to blend in with the forests and green mountains, even if it has been taken to the limits!)