Some people prefer one format over the other. On the other hand, if you are only using a word processor, you can still do a lot by placing spaces between characters. If you want to increase the space, add multiple spaces because going to a larger font size will disrupt your line to line spacing. Below are links to the most common. See the documentation included with the fonts for more details.
Chances are nothing is wrong.
It is just that your monitor has a resolution on the order of 72 pixels per inch and your printer probably has a resolution of more than 300 dots per inch. Some of the lettering fonts do not have full punctuation or accents. If the font does not have a given character, you may get all sorts of strange things when you try to print that character. This is just your printer doing what printers are suppose to do. On the other hand, some of the artwork fonts are very detailed and they may tax older computers or printers.