What temp/speed do you blow dry your hair (with a diffuser of course)?

For the past, I don't know how many years, maybe 5, I've used medium heat/low speed. I read an article a week or 2 ago on NC.com that mentioned high heat/low speed so I tried it. I loved it. It took less time to dry and my curls looked GREAT, I was happy.

Well, this past week my hair looks dry and I'm not happy. So, this morning I went back to medium heat/low speed and my hair isn't as curly. It doesn't look dry, but I want my curls back!