I agree with Peckish. It is all personal preference. I've done needle turn and raw edge applique. And note that with raw edge there are a myriad of ways to actually stitch the edges (straight stitch near the edge, buttonhole, zigzag, i'm sure there's more). Personally, I decided after doing one that I don't like raw edge applique at all. And I don't trust it to survive washings - but I have no personal experience there, so don't take my word for it. I prefer the look of well-done needle-turn applique, but not the effort
So I don't do applique.