I have criteria that plants have to meet for me to buy them.
They must have scent, the more the better
They must be easy to grow. Self-seeding is a plus or easy to propagate.
They must have flowers.
If the flowers are poor the scent must make up for it.
If the scent is poor the flowers must be copious.
Everything has be attractive to wildlife.
I don't grow flowerless shrubs, I rarely grow shrubs of any kind, they are a bit bleurgh to me.