My point was not to say, Dutch Tilting the camera a lot is always to a bad effect. It can be a great effect if used wisely with purpose.
A general rule of thumb could be: Don't make the flat ground look too slanted, unless it works for a certain effect.
Here, I am posting a photo with nearly the same amount of tilt as your last post. I avoided showng the ground, so the floor will not seem like the Cosplayer might lose her balance and fall.