Nope, the 100mm Macro is a great lens for portraits as well. Macro simply means it has the capability of reproducing near or better than 100% of subject size. Not that it can only be used in those circumstances (barring things like a microscope). So, you can use it just like any other 100mm lens, with the added bonus that you know it's got very good optics, pretty good IS, and pretty sharp across the entire frame and can be used at up to 1:1 macro photography. Oh, and it's a reasonably fast lens which can give you shallow DoF if you want.