There are many many types of grass seed. Hundreds at least of grasses that do not belong on a lawn alone.
For the ones that do, there are thousands.  Most people hear a salesman or landscaper say Kentucky blue grass for instance, and think, "that is the grass I want".  What they do not realize is that there are hundreds of strains of Kentucky blue grass. some require outrageous amounts of fertilizer. Some are that way with water.
Some, the roots will till out so the lawn thickens, some will resist various diseases and or insects.

It is similar with all the basic grasses. there are hundreds of strains of each type of grass, and new ones being bred every year. They are bred for various qualities. Drought resistance, insect, disease resistance, and so on.
You don't want to choose one that is unsuitable for your soil. In times of late, with water restrictions you want a grass that requires less water. You want your grass to be able to withstand traffic. resist diseases and lawn insects that are common in your area.

Did you know that most landscapers use a landscapers blend of seed which consists of up to 60% annual rye grass? Annual plants, including grass, dies every fall when the weather gets cold and must be replanted every spring. Rain during the winter washes good top soil away. It is the opposite in the South East. Rye grass is planted for the winter months and dies out for summer.

Start with a high quality seed, create high quality soil, and you cannot stop grass from growing.