Butterflies and bees are great, but I love seeing all the other pollenators that I rarely recognize. Native bees, beetles, and even some tiny (non stinging) wasps. I especially love that no matter what part of nature you're most interested in attracting/observing, native plants are almost always a good place to start.
I love micromoths too. we've got a micromoth called Zealandopterix zonodoxa its so cute and even has little mandibles that it can eat with. I love them so much.