How does similarity or complementarity pertain to the initial attraction?

Discussion Forum: “Birds of a Feather”

Reflect on the adages, “birds of a feather flock together” (similarity) and “opposites attract” (complementary).  Consider a relevant relationship  or circumstance (it can be one you’ve observed or experienced yourself) that reflects one or both of these ideas.

POST:  How does similarity or complementarity pertain to the initial attraction?  How has it impacted the evolution or commitment?  In general, do you think similarity is important here?  Explain.