Most websites have buttons on them. Maybe yours does. As a call to action, they’re much more noticeable than plain text links. However, why go to the effort of getting noticed, only to let yourself down with something dull? Too many times a designer has fired up Photoshop, created a special button to click, and wasted it with a message that might as well say: “click this and be bored”.
Buttons can have anything on them. So use them to show your benefits. Make them say: “this’ll be the best thing you’ll click on today”.