Hi, EJ
Nothing wrong with your planting! I like to see a natural looking garden! When you take a walk in the countryside, you won't see only hot colours growing together, or a bank only covered in flowers of shades of blue!
I'm afraid I'm rather old-fashioned when it comes to planting - I look for where a plant will go according to space first, and if it has a lovely perfume it HAS to go somewhere where I am able to smell it without doing yoga in case I fall in the flower bed! :D