One of the interesting things about music is that it has two faces -- preparation and performance. By nature, the performance is public. Even if you are in a band, much of what is preparation is a private affair. Both sides have their pleasures and pains. The ideal would be to realize the joys of preparation and performance while minimizing the downs sides. If you can do without the joys of performance you have lots to play with in terms of maximizing the joys of preparation. I guess it is very personal, but for me there comes a point where I need to share or somehow validate my playing/singing by having someone else hear it.

It is also possible to get in a position where there is so much time spent on performing that the joys of practice are lost. An introvert might go long periods without performing and struggle too much perfermance demand to allow for practice time. An extrovert will itch at the chance to get on stage and might love the travel, and so on. For them, it is hard to make themselves practice, and sometimes it will show.

So this question could be turned around. Are you a practice junkie? I confess. But I was once a performance junkie. Maybe some day I'll get it right.