I joined Eastern Star just after receiving my Master Mason degree. To be perfectly honest, I really only joined because the girl I was then seeing pretty seriously had joined OES, and it was something we could do together.
BUT we broke up a long time back, and between the awkwardness of sitting in Chapter together and all of the other duties that have devolved on me since then, I haven't been back. I'll probably be active in OES eventually, like, when I get married, but until then, I think blue Lodge and SR are more "for me".