These are dormant areas of interest where I don't have a current fixation but they are in my menu of things I can look to in the future. 

Most of my interests over the years take a long time to develop and I've grown to learn how to identify these. Bird watching for eg, I have no current interest in this but I know that it ticks all the boxes of what I like in an interest and it's one which I feel I'll get into at some point at least just casually.