It used to be that business and leisure travelers were fairly different in terms of what values they were seeking. It used to be that business travelers were in search of flights that would get them where they wanted to go at the exact time they wanted to be there. Price was, therefore, much less of an issue. By contrast, leisure travelers tended to be focused solely on price. This is why leisure travelers generally flew low-cost airlines and business passengers did not.
This has changed, since the global recession started a few years ago. Since then, business and leisure travelers have come to be pretty identical. They are both looking almost exclusively for low-cost flights above all other considerations. It is not clear whether this trend will continue after the world economy picks up again.