Whether breadth is considered to be negative or positive will depend on the kind of job for which you are applying.

For example, consider a high-powered research department looking for someone in area X. If only half of your work is in area X, then you're at a disadvantage.

On the other hand, consider a department that values faculty research mainly for its ability to enhance the undergraduate experience, or bring in generic prestige, or whatever. Here you could be at advantage if you can sell yourself as a generalist. But beware: The problem of perceived "lack of focus" is very real. You want to show that you have a research program that could keep you occupied for many years. Perhaps you want to be seen as "not narrow", rather than "broad".