I love back-basting and needle-turning. I love how portable it is and how little prep it takes.
I hate freezer paper or starch or any other method that requires an iron. I adore the crisp look of it afterward but frankly I'm not coordinated enough to do it and still have fingerprints at the end. Also the cussing.
I'm also not a fan of raw-edge or machine applique, again because of the not-being-coordinated thing. My results just don't look as cool as the ones others are able to get with these methods.
However! I have tried to learn as many methods as possible because you never know when you'll need to do something different to get an effect that you want. I've never had a project where I used needle-turn for every piece. I also thought back-basting would be too inefficient until I tried it a few times and got the hang of it.
There are many different ways to get beautiful results. Try as many as you can and just see what you like!