@NotMeNotYou: I'll fold and say for anything that we would see on this site, png is better.

But I'm still am going to use jpeg for photography, because tiff files are too large, and png have artifacting if you use sharpening software.

@zenitix: You're right in that case because for photography jpg is the best choice by far. But obviously on here most things are digitally created in which case PNG is superior because jpg just destroys small details, like brush strokes or fine hairs.

@zenitix: On the other hand, if you photograph fine hairs that hair is actually made up of many, many slightly differently colored pixels which creates the "noise" jpg is optimized to handle. PNG just chokes to death on that.