It is true that different mediums all have qualities unique to each of them. For example, at least some of the beauty of oil on canvas stems from the techniques used by the artist in layering, texturing to give depth to a work. On the other hand, watercolours are more moody, and its colours have a huge impact on a space – ranging from bright and vibrant to dark and impressionistic.
However, at AnYahh, we’d always recommend that you choose a piece of art not by the medium but on the basis of how it speaks to you. Keep in mind though, that different mediums require different kinds of care and handling, so you might want to eliminate choices on this basis. For example – moist and humid climates aren’t the best environments for paper works, and they’ll need to be glass mounted.
Other than these considerations, purchase a piece of art that you like and enjoy.