It depends on what you mean by "picture friendly". Images inline when you use a direct link so it's inherently more picture-friendly than other sites. However, a majority of content that gets shared is more indepth and discussion-focused. A post with a single image is unlikely to get shared around like a photo on /r/pics does. A single photo (probably with some text) that broaches a topic, instigates a discussion, asks questions probably will.
Hubski has been referred to as the "Third Place of the internet" meaning that you get your low-fi content from other places, your socializing with your friends in other places, and you come here when you are looking for something a bit deeper, a bit slower, a bit less vitriolic, etc.