Worst/best cartilage piercing? (Healing wise)

So I have my helix pierced, and it's pretty good so far (it's 6 months old).. I REALLY love it. And im planning a few other cartilage piercings. For example, a tragus, an industrial, another helix, a triple forward (or anti) helix, and a daith.

So out of all your cartilage piercings, what's the hardest one ? In terms of healing. What's the easiest one? And why?

Bonus question: what's your favourite piercing?