I've been on LJ for 8 years, and appreciate the sorts of access to kindred spirits it affords. I'm proud to say my LJ has become a playful, intelligent and sexy place. Oh, and I have several other sex-blogs: ultradevi.tumblr.com (lots of lezzie stuff but not hard porn) and ultradevi2.tumblr.com (which is softer -- romantic, fashion, art). Tumblr lets me explore erotic photography to my heart's content.
I also prowl Flickr for femmie photos that I can reblog to my LJ, ALWAYS with the member's consent. Flickr used to be a lot more blog-friendly, but they nowadays aggressively push self-censorship for most erotica. Tried PhotoBucket but didn't much like it. Oh, GOTTA mention a terrific LJ photographer, scottchurch, who has a unique (in my LJ experience) "share" button on his deliciously naughty photos -- and doesn't want shot-by-shot consent.
* I'm aware of the complications of "consensual non-consent" (partners who consciously agree NOT to take "no" for an answer -- hopefully they at least have "safe words"), but I do worry about the occasional abusive dom/domme. I've had submissive LJ friends who were horribly mistreated, defrauded, hurt, etc. -- and sometimes interventions are needful.