I had to respond to this post as I have a different perspective on all of this. I am an ESTJ--a total extrovert--but ESTJ's also have to have quiet time alone. Maybe one of the only extroverted types that will go into themselves and need to be alone at times.
Friends are constantly now trying to get me to go out and do things 24/7 and don't understand that I like being alone at times. Good grief, I gave over 30 years to selling people, hence, I feel like I have earned that time alone now...and friends STILL don't seem to quite get it thinking that, since I am "funny" and make people laugh and seem to be enjoying myself around people, I just don't need time to re-charge myself. I do, tho.
Do I enjoy my own company? Heck, yes. I do lots of research on financial subjects and need 1. peace and quiet and 2 no toxicity in my life from outside sources.
The point is: Even some extroverted types need quiet time alone to enjoy their own company. And, yes, I do enjoy my own company....at least, I don't have to look my best then.