My recommendation would be to first select PD material that will make you more effective on your job. Once you have reached your desired effectiveness, you will have freed-up time for other endeavours (either at your job or in your personal life).
You can then set specific goals for these other endeavours and find PD material to help you reach those goals.
I can certainly understand your comment about "being hooked". I was introduced to PD about 1 year ago and I am hooked also!