Adrienne, this is a great question and something I think about, too. I agree wholeheartedly with what unfrumped, cjh, and Liz say, and I'm pretty sure I couldn't have articulated it myself!
I sew a lot of clothes for myself. I consider myself a garment sewer, first and foremost. (And within the category of "garment sewer," I am about fast and easy, modern and sometimes a little avant garde or arty. I rarely venture into tailored, classic looks or techniques. Sometimes, but not very often!) I have not gotten into quilting and rarely done crafty sewing techniques like applique, pintucking, etc. However, . . . I work in a sewing store, and part of my job is to teach machine embroidery and all kinds of other decorative techniques that one can do with a machine. I love the look of much of the embroidery, applique, felting, and other fun stuff, and would like to work it into some of my garments--without looking like, well, let's just say, without compromising my usual style, the style that feels like "me." I think of the difference you're describing as aspiring to an arty or creative look rather than a crafty one.
Often I finish making something, and I realize: It is something I would not buy if I had tried it on in a store. In that case, usually I will wear it once, just for good measure, and then add it to my "sewing samples," as opposed to my actual working wardrobe!