That is the beauty of using tags... you can use anything on it. They are great on cards too. The first Sizzix die I bought was tags. I use the office ones too if I want that look. I also cut them out of different color cardstock or print paper. You can journal on them. You can put a stamped image on them. Stickers too. You can put titles with tags. You can stickle on them. Put a die cut on them. You can put bling on them. You can certainly ink them or glitter them. Cut them out of glitter paper.
I have a layout where I made the title but I will post it now.
Like Linda said you can do whatever you want when it comes to tags, decorate them however you want. You can make them in shapes other than the standard tag form. I was just part of a dress form tag swap that we some people used the actually dress form itself as the tag