Arial: Arial font is a pretty commonly used font. It's one of my favorite fonts to use. Even though its a sans-serif font, it's pretty easy to read and easy on the eyes.
Courier-new: courier-new is a very retro font, it looks as though you're typing with a typewriter. It has smooth letters with smooth serifs.
Verdana: Verdana is a wider font than most other fonts. Its pretty smooth, easy to read. It looks good, but I wouldn't want to read a whole block of text with it.
Georgia: Georgia looks like a classic font that would be good to type papers with. It's a typical typing font such as the Garamond font and Times New Roman.