Although I have been on the forum for a long time, I'm an infrequent poster (or perhaps more accurately, a sporadic poster). For what they're worth, here are my thoughts:
I agree that this forum is very welcoming. I never feel like anyone is mean, catty, or would leave someone out. In the time I have been on this forum I have seen many new posters become solid members of the community. I think the women here recognize that everyone was new at one point, and actively try to be inclusive.
Having said that, I think that the one thing that really makes a person more a part of the community is posting photos. I realize I would be more included if I did so, but I don't. I have two main reasons for this. The first (and biggest) is that it is really impractical for me to do so. My full-length mirror is located in a foyer with poor lighting, and the colors never look right when I take photos. I feel like people wouldn't be able to accurately assess my wardrobe if they saw the colors as they appear in the photos I would post.
The second is that although I am confident in my style, the feedback I would want would have to do with fit. To be honest, I almost feel like the women on this forum are TOO nice when it comes to discussing fit. I'll amend that: either they are too nice, or they are looking at other aspects of an outfit, like its style, trendiness, etc., and fit isn't as front-and-center. I can totally understand this because people on the internet aren't going to really know if that stomach pooch is something I can hide easily, or if it is just part of my shape that I have to deal with if I'm going to wear clothes. When it comes down to it, my questions would be more of the "is this flattering to my thighs" or "do you see my gut sticking out here" and I don't feel like those are questions I see asked/answered all that much on this site.
Along those lines, I also feel very reluctant to post when someone is wearing something I do not think is the most figure-flattering. I am critical with myself in this regard, and sometimes I will see someone wearing something that pulls oddly, or highlights a problem area. I believe that when people post photos they want to know about those things, but when 20 people have rated something "killer," I feel like everyone is going to think I am a mean and negative person if I say "well, I think it's a little tight on your backside."
And speaking of killer, I guess one thing I think might be off-putting to others is that it almost seems that a lot of the women on the board use the same vocabulary, if that makes sense. There is a lot of "killer," "launching into orbit," "specs" (instead of glasses), etc. I realize that these are all Angie-isms, and I am certainly not criticizing Angie (I don't think that's something she can or should change), and I'm not even criticizing anyone else who likes to adopt her terms. But since those terms aren't necessarily mainstream in the US, I can see how someone brand new might come in, see the repetition of that language among several people, and feel like they just don't fit in.