As a coin collector, I like to see both text and image on a coin, otherwise for me it isn't a coin. However, as a thematic collector, I tend to focus on the image, but there are times when the style of the text, or the font, is at least as noteworthy as the the image. On rare occasions the design consists of text only and no image.
In 2005, the Royal Mint (UK) issued a 50p to commemorate the 250th anniversary of Samuel Johnson's "A Dictionary of the English Language". At first I was annoyed when I read that the design would be all text, but when I saw it, I fell in love with it. The designer, Tom Phillips, has used the various fonts to good effect, and obviously put a lot of thought into the design.