For magic loop, I really like the technique because it only requires ONE circular needle... and I almost only have circs... (Better for my wrists and the train passengers)
And, I use thin yarn with thick needles. At the beginning (I can remember) it was quite ... strange... I thought to myself, how can one knit such thin yarn with such big needles, but now I've grown accustomed to it, and I really like working lace works....
My technique for holding yarn is the same for knitting and crochet, I put the yarn over the index finger, below middle finger, above ring finger and below pinky, ... that gives me a good tension....
The ways of Yarn are inscrutable.
I'm NOT a "miss", I'm a lady!