I think it's very interesting how so many of us share a certain sense of privacy when it comes to our relationship with Tolkien's works - yet we're here sharing this with each other.
I think personally I am into very many books, movies or even tv shows that have active "fandoms" but I don't feel the need to partake in them. I'm really not so interested in anybody else's interpretation and feelings about Tolkien; just about my own, and perhaps that of people I care about. And even then, I don't think I necessarily care about - for example - what my partner thinks about
The Lord of the Rings because it would be an insight on
LotR, I would care because it's an inisght on my partner himself.
It goes for all fandoms to a degree, but Tolkien the most. So in that sense I'm grateful I joined the 'downs when I was still a fandom extrovert looking to connect with more people, not the fandom introvert I am now that just wants to chat with her buddies. (Which all 'downers are, incidentally, whether we know each other well or not at all. <3)
What I enjoy the most about fandoms is the creativity that comes with them - fan art, theatre / music / film productions, humour, even fan fiction to a degree, and for that the community is great. But I feel that even with those these are periods where I'm more receptive and periods when I'm less receptive to this "outside influence". And I think that's okay.
Also, I don't have that experience that much with Tolkien and the PJ films, but it sure is complicated being a fan of
A Song of Ice and Fire without not having much interest in (the recent seasons of)
Game of Thrones. No, I don't want to discuss why I like Jaime Lannister and Brienne of Tarth with you if you've only seen the show, because both the characters, their relationship, and the whole worldbuilding around them are not the same in the show as in the books. Likewise, I wouldn't have any interest discussing say, Aragorn's character arc with somebody who's only seen the movies, or maybe seen the movies 20 times while having read the book once 15 years ago. I don't want to advocate gatekeeping or fandom snobbery, but when it comes to things where people equate the original books with their very popular movie/tv adaptations, my heart always bleeds a little. (And I'm not saying I don't do this myself. I would be more likely to be interested in discussing
The Witcher Netflix show than the books, and probably
The Witcher book purists would hate to discuss
The Witcher with me. And that's okay too. We live in an era of oversharing, but not everything needs to be shared with everyone.)