There are many types of panties, each with their own unique features and designs. Some common types include:

1. Briefs: also known as “granny panties,” these are the most traditional and classic style of panty, with full coverage of the hips and rear.
2. Thongs: These are designed to minimize the appearance of panty lines and provide minimal coverage in the rear.
3. Boyshorts: These are designed to resemble men’s boxers and provide full coverage of the hips and rear.
4. G-strings: These are similar to thongs, but have even less coverage in the rear.
5. Bikinis: These are similar to briefs but have a lower waistband and higher leg cuts.
6. Hipsters: These are similar to briefs, but sit lower on the hips.

It is difficult to determine which type of panty is the most used since it varies depending on individual preference and cultural background. Generally, briefs and bikinis are considered as the most popular panty type.

Note that this list is not exhaustive as there are other types of panties like high-waisted, lingerie, and sporty.