Sometimes it is interesting to think about how different people think about the same thing differently. One example I learnt for geography at uni (which is quite an interesting example from the geo perspective so I will repeat it and add to it) was how someone could see a forest or woodland in different ways. It could be seen as a resource, or a place of biodiversity, or a place where you can go on walks or outdoor pursuits or a place of memories or somewhere isolated at night.
Perception of course varies more than that. As I mentioned previously on this blog language is one thing the affects perception e.g. how you see colours. But there are of course physical differences in people that will affect how somebody sees something, Synesthesia (wikipedia link) is one interesting occurrence in some people.
Different people view things from a different perspective. Even if they are looking at the same thing they look at it differently and make different judgements a bit like looking at the same tree from a different place.With a piece of art, some may interpret a certain colour of blue as being similar to the sky and others may think of something completely different.The differences go even further of course if you look at the differences between the way animals view things, a cat may see a ball of wool and see it as fun to play with, whereas a dog may see it as a still, boring object. But even between one species that will vary, each individual is unique.. (I love cats and dogs they are so cute.)