Strong fit if...
Companion-first small dog
Shih Tzus fit best with people who want an affectionate small dog that stays close and joins normal home life.
Smaller-home routine
They often do well in apartments or smaller homes when the schedule still includes short walks, grooming, and plenty of company.
You can keep up with grooming
The best fit is a home ready for brushing, face cleaning, dental care, and regular trims instead of treating the coat as effortless.