Reading is a healthy obsession : )

Try exploring this perspective. Spend some time contemplating and reflecting upon the types of feelings and emotions that are generated within you when you develop a new 'interest' and then find yourself becoming fixated on it. How does it make you feel while you are going through this process? Do you feel excitement, elation, exuberance? If so, might seeking to generate those particular emotions be a means for compensating for other aspects of your mental state that may be lacking/hurting? Does the way you treat these hobbies/activities give you some sense of having control, structure, security? Perhaps a sense of purpose and direction? If so, can you determine if subconsciously may be longing for these types of qualities in your life and your transient interests provide you with a more superficial sense of fulfilling this? Some of the hobbies you mentioned and as you noted might be more appropriate for a younger crowd. Is there any association between those hobbies and memories of your childhood or youth - perhaps a desire to return to an earlier state of being? It sounds like these interests really consume and occupy your mind when you're engaged in them. Is there anything from your past life experience that's been really difficult for you to cope with and emotionally process - and could these hobbies/interests be a means for distracting (and occupying) your mind and more or less protecting you from devoting any conscious energy to something that might be uncomfortable and challenging to address?

I'm just throwing ideas out there for you to contemplate. Look at your 'obsessions' as a symptom of an underlying cause. If you just attempt to control the symptoms (behavior) only, you are not going to be getting to the heart of the matter and the true source that is responsible for creating those symptoms in the first place. If I had to guess I would suspect that there is some underlying emotional energy (or blockage) that you are subconsciously carrying with you and that through instrospection and self-reflection you will be able to identify exactly what's transpiring within you in terms of what's fueling your mindset and behaviors. By confronting, acknowledging, and allowing yourself to fully consciously experience previously suppressed/repressed emotions - you will release them and free yourself from their prior influence and affect on you.