What is the most useful output format for graphs?

What is the most useful output format for graphs?

Before any of you run at the closing vote let me say that I understand
that this question may be subjective, and the expected answer may begin by
"it depends". Nevertheless, it is an actually relevant problem I run into,
as I am creating more and more graphs, and I don't necessarily know the
exact way I am going to use them, or don't have the time to test for the
final use case immediately.
So I am leveraging the experience of SO R users to get good reasons to
choose one over the other, between jpg(), bmp(), png(), tiff(), pdf() and
possibly with which options. I don't have the experience in R and the
knowledge in the different formats to choose wisely.
Potential use cases:
quick look after or during run time of algorithms
presentations (.ppt mainly)
reports (word or latex)
publication (internet)
storage (without too much loss and to transform it later for a specific use)
anything relevant I forgot
Thanks! I'm happy to make the question clearer.