Overthinking my purpose?

I did the weekly exercise and chose my purpose–to have a super fun life by creating epic experiences for myself. When I chose it, I was so excited and ready to commit. I’m still committed, but not so excited. It’s like I lived it and breathed it in my mind for a few minutes, and now I’m like “eh”. This feeling is hindering my creativity when I’m answering the second question in the daily exercise. It’s like nothing quite inspires me in the same way it originally did. Am I expecting too much or putting too much value on that original “YES!” light bulb moment? What questions can I ask myself to better tease out whether this is really the right purpose I want for myself?