I would suggest always posting 2 or more images. I would also recommend adding some commentary on what the post means or what kind of theme you portray. Context is king but photography is also an art. Finding the balance of using words and photos to get your expressions put out in a successful way is a difficult task. Your photography is a bit different than and abstract than most and for that I appreciate your more artistic approach. Also, interacting with other users on their posts is important too.