What is the difference between Truetype/postscript/opentype fonts

TrueType fonts can be resized to any size and are clearly readable in all sizes. You can send them to any printer or other output device that Windows supports. OpenType fonts are related to TrueType fonts, but include larger basic character set extensions, including small caps, old style numbers, and more complex shapes such as glyphs and ligatures. OpenType fonts are clearly readable at any size and can be sent to any printer or other output device that Windows supports.

PostScript fonts are a high-quality font, with smooth lines and highlighted details. They are often used for printing, especially for professional quality, such as books or magazines.

What kind of font is best for me?

Not necessarily. If you only want a font that prints well and is easy to read on the screen, you might consider using a TrueType font. If you need a large character set for language overlay and fine layout, you may want to use the OpenType font. PostScript fonts are a good choice if you need to print professional-quality print publications, such as glossy magazines, or if you need to print commercially.