Arial: Arial has become so overused that its become the font to use when you need a sans serif and is its the standard sans serif front for web pages. There are so many better options out there such as Helvetica, Century Gothic, Trebuchet and Myriad.
Brush Script: I can not tell you how much I hate Brush Script. People need to learn that it does not look like hand writing. I will never use this font when there are so many other options out there for a "scripty" style font.
Comic Sans: The #1 most hated font ever for a reason. I would not even use this font if I was creating a comic.
Copperplate Gothic: This font almost feels like it has a multiple personality disorder. It doesn't know if it wants to be a Serif font or a San Serif font. The spacing is horrible, the weight makes it very difficult to read and finally it uses small caps.
Courier New: It is mono-spaced. There is nothing more to say about it. Unless you used a typewriter it should never be used.
Curlz: Hard to read and way to decorative.
Edwardian Script: Not only is this font overly decorative on the capitals, its weight is so thin its hard to read.
Jokerman: I have seen people use this font when they want to appear "Funky" or "Hip" or "Cool" or just plain "Fun". In fact, it has the opposite effect.
Monotype Corsiva: There has never been one point in my life where I even thought about using this font. I have never found a use for it.
Old English: Next to impossible to read. Widely used in the middle ages, but then again very few people could read unless you were nobility. In fact this Font has been so over used to represent High Class, Nobility and even god forbid "tough" that it has lost that meaning. The only time I would use this font was if it was for a Pub Sign in England.
Microsoft Sans Serif: I can not tell the difference between this and Arial.
Papyrus: People love to use this font for everyday uses. It does not read well. It is tall, extremely thin and the edges are not smooth making it even harder to read. It works for large headlines and titles, even then I would be extremely hesitant to use it.
Times New Roman: The number one most popular font. Because it is so overused I will always look for an alternative.
Viner Hand: Its like a thicker, more "scripy" version or papyrus.