Personally, I like to have a unity when I’m displaying artworks. The art itself might be diverse, but I like to unify the style of framing – I really like minimal black or white wooden frames as a way of unifying pieces. You can group artworks together and, simply by using the one colour, the frames almost disappear. Of course, this depends on the style of art – I’m always drawn to screenprints that are complemented by a very clean and minimal framing style.
But then, art is so personal, you really have to go with what feels right for you. I was in a house recently where the owners had picked up a pair of oil portraits in an auction, and they had the most elaborate frames. They weren’t expensive, and they were different in style to the other artworks the couple had, but they looked so dramatic set against a beautiful Farrow & Ball wall colour. It reminded me that you can’t be too set in your rules.