I will never, ever understand why people think that Arial is an acceptable choice to use for something that isn’t a webpage with lots of text. I get angry when I see it. Unless you have a very good reason for using it, and you will know exactly when that is, there are only two other possible reasons that you use it.

It takes all of about fifteen seconds to analyze the text that you’re setting and choose a more suitable font. It costs nothing to acquire a typeface that works better with your text. If you can think of a sans-serif font that is legible, then 90% of the time, all you have to do is use that font instead. And believe me, everyone should know at least two, unless of course, you are blind. Knowing this, if you still choose Arial, then you are lazy.

The other case happens when you actually like Arial and think that it looks good. I can’t believe that anyone who understands design honestly thinks this. So, if you do think it looks good, you probably have no business setting any text to type at all. You should probably defer the selection of any typefaces to someone more knowledgeable in these matters.