John- I don't see the site as serious, or not serious. Certain threads will go in a certain direction, depending on the OP's purpose. Personally, I'm not interested in the "I have the 1.8 lens, should I buy the 1.2?" kind of threads. I really don't care about the different arguments about "best" film/developer/camera, either. There's a reason there are so many choices. It's up to the user to decide what's best for them.
I'm drawn to threads about image making... the thought process behind it, and those trying to push themselves beyond the basics. I haven't used a camera/lens in months, yet I've produced a bunch of new photographs (my abstracts and cityscapes). After 40+ years of film & darkroom, I'm still amazed by the infinite possibilities this medium offers. It's what keeps me going, and pushing my own limits.