No one's posted on this thread for a couple of days, but I feel compelled to add my two cents. Unlike some, who responded to your question, Mimimus, with a glib "no" and ran away, I think it is a thought provoking and insightful question. I was a Regular Pioneer for 6 years and a MS who spent some time at Bethel and even went to an International Convention in South America before I left. I was baptised at 16 and was in until I was 24. I have been out for more than 5 years, but still have family who are witnesses. They barely talk to me, if at all, even though I was never disfellowshipped or disassociated. I just kind of walked out the door and never walked back in.
In doing so I feel liberated in a way, but I can definitely say that there is a great deal of confusion. I'm a scientifically minded person who now considers myself to be agnostic, but losing God has also meant losing the certainty and direction I had in life. Religion of any kind simply will not do any longer. And sometimes I feel like I've lost part of myself in all of that. Sometimes now it seems there's no point to it all, so why bother? Anyone else feel that way sometimes? So I guess I miss feeling like I was a part of something larger than myself instead of being out here on my own with no real sense of where it is I'm heading.
I would also say that for me it's the loss of every friend I'd ever known. Truth be told, many of them weren't really friends at all, just people who would use me and never give anything in return. But a few (very few) were friends for their part and I do miss them. I never really made friends in school with non-Witnesses (because why would we, that would have been aweful, right?), so they were all I ever had. I also miss the only girl I ever fell in love with, who is still a witness. And even though she married someone else now, she still has my email address and has been bugging me to come back to the church. She even invited me to the District Convention last summer, which was really odd after all these years being out. But the weirdest part was that I went. Just for half of one day, that was all I could stomach. And I'm sure I rocked their world a little since I now have a beard and long hair and showed up dressed head to toe in all black. :) But I still ask myself why it is that I even considered doing that. I'm not sure I have an answer.
So I would say "yes", and "no" to missing being a Witness. You can't unlearn what you have learned, so I don't think I could go back if I wanted to (which I don't). But there are certain things about that life, and who I was when I was living it, that I miss very much sometimes.
Great, great question. Thanks.