I usually stick to Sweet Olive bushes for most of my town and then I change into hydrangea, hibiscus or azalea bushes as accent for different villager homes.
ex: When I start reforming my new town, Plucky will get red hibiscus bushes because she is an Island WA bab. Francine will get blue hydrangeas, Chrissy will get pink ones, Merengue will get like white azaleas or soemthing, and so on.
But I really like Olive bushes because they aren't aggressive and I usually like having a laidback kind of easygoing town that is planned, but not like color scheme planned to the point where I'm like "use my dream code and be amazed." I keep it pretty average.