Everyone seems to think when you say "Macrophotography" that it means flowers, or leaves or petals, but that's not entirely true. There is a theory that everything in the world has already been photographed.
So I like to work on the theory "let's push that". Macro, as far as photography is concerned, would have to be the new frontier. If everything in the world has already been photographed, the question is: how can we photograph it differently?
Everyone has taken a photo of someone's eyes, in fact, we actually say in photography "miss the eyes, miss the shot". But what happens if we come in really, really close? The human eye, fruit, macrophotography subjects are absolutely everywhere. If you're looking for something to do on the weekend and you want to get better at macrophotography, practice makes perfect. One of the assignment I routinely send our students is a scavenger hunt.
Start with the letter A, then move to B. Work your way through the alphabet and the next week challenge yourself to find something with different letters of the alphabet. Watch how quickly and amazingly your portfolio of macrophotography grows.
So remember, macrophotography doesn't need to be limited just to flowers. Everything can be your subject.