Ceramic is ok when new, overtime it loses most of its non-stick ability,
Nothing comes close to the non-stick-ness of teflon.
The other option is steel wok, the way that works is, you let the carbon burn on, develop with the oil, and it creates a <non stick> blackened layer, you're not supposed to ever wash it with soap, only a wipe with some water. Not really sure how healthy this actually is.