After being the character with the best character work throughout the series, The Doctor was due for an episode that generally works and speaks to his particular situation, but maybe wasn't all that necessary.
Basically he thinks he can get more respect from a random visiting alien culture, and so makes the decision to leave the ship, only to discover his horrible mistake. It's the basic plot of his need for validation and expanded rights, but at a more frivolous angle.
It's certainly entertaining, but not exactly essential.
franchise * series * essential * character
Memory Alpha summary.