Congratulations on your 5 months fantail! I loved reading your post.
Gosh, it really resonates in how I'm feeling as well. Mecanix also stated it so eloquently about the contentment and peace. I'm just a week over 5 months sober, and I've also been hibernating (I call it cocooning) virtually the entire time. I find myself pondering deep thoughts like my purpose, the Universe, appreciating nature, recognizing ego driven tactics etc. etc. I'm also at a transitional stage in my life and am finding more satisfaction and serenity in taking a walk or a run than being social. I feel very protective of my energy now, and also feeling like I no longer need to be constantly busy to prove my self worth. I've also wondered if it's depression (a lot of experience of that) but I don't think it is. I actually think it's a metamorphosis, which takes a little thinking time in that cocooning state.