Terry Pratchet did a whole bit about exactly this in The Last Continent (one of the Disc world books) - the God of Evolution is obsessed with beetles and creates new ones as a form of self-soothing.

Apparently he was inspired by a quote from JBS Haldane:

When asked what his studies of Creation had revealed to him about the nature of God, the Scottish geneticist J. B. S. Haldane (1892-1964) supposedly answered: “He seems to have had an inordinate fondness for beetles.”