I generally prefer to grow my own eggplant, but if you are Selecting store bought eggplant, look for heavy, firm fruit with unblemished skin. Seeds in Eggplant are responsible for the bitter taste that sometimes accompanies it when cooked.
Male eggplants have fewer seeds than the female, they have a rounder, smoother blossom end or base. The blossom end of a female eggplant is generally indented. Smaller eggplant also have less seeds and are therefore less bitter than larger ones .