I generally like unusual perspectives, because most things, that we see in our urban environment, are a bit too well-known in their usual appearance. But one needs to be careful not to exaggerate and become ridicolous with these attempts. It's a question of mood to decide wether it is too much or not.

Often, not only with real monuments like an equestrian statue, things become more interesting when seen from unexpected angles. Even though a real sculpture is appealing from every angle!

Although one should think, the planning has taken this view exclusively in consideration, being on a higher position brings a better shape to most sculptures. You don't need to be at their feet.
The ability to look over things brings other big advantages too: You might see what is behind a wall – and you can increase the proportion of floor area in the image. This makes images of architectural configurations much more vivid in their spatial arrangement.