Her villains are usually about gender, love vs war, and submission vs domination. Ares-the god of war ofc, Circe is her philosophical mirror-the hateful domination to diana's loving submission (changing people to their worst self/i.e the whole turning people beastly thing) and Cheetah is her quintessential jealous mastermind but she's suffering an illness(sometimes split personality, sometimes a curse). Her other characters deal with those things as well Silver Swan(gender, rehabilitation), Dr Psycho(gender/misogyny), Queen Clea(war/politics), Queen Atomia( war), Doctor poison( chemical/bioological warfare, gender), First Born(politics)
Dianas basically the DC gateway to magic but shes isnt all about magic she sometimes dabbles in scifi as well basically theres a decent mix that tends to sway towards magic given her background. I think the connecting thing is her dedication to love, compassion, rehabilitative justice and teaching people to submit to love(which is basically breaking the bonds of evil domination and replacing those bonds with more progressive and helpful bonds/systems/governments/leaders).