Alas, I am among that tiny minority of the population for whom DEET is an irratant. Even if I just put in on my clothes, it somehow sweats through and I end up with a burning sensation, and I can still breathe the the stuff and it burns my nose/ throat.
So for me, it is geraniol. All natural (derived from plant oils), and reasonably effective. Ironically, I understand that more people are allergic to this than DEET, but not me.