Didgeridoo has been proven to help sleep apnea. It strengthens one of the muscles in the throat; the name of which escapes me right now.

I like some of the European contemporary styles because the rhythms are so fast and dynamic.

I also love the traditional styles for their earthy tones and more systematic rhythms. Its on my bucket list to go to Australia and learn the trad styles directly from the source one day.

Two of my favorite contemporary players

YouTube - Ondrej Smeykal Playing a Chad Butler Didgeridoo

YouTube - ZALEM em Portugal