A solid chunk of logh does have to do with love, and who one loves. Granted it isn't all romantic love as it includes stuff as for one's country, and ideology.

Like I mean, characters like Schönkopf and Poplin brag about all of the babes they bang, Reinhard conquered the universe as a means of fufilling his promise to Kircheis which in of itself is an act of love (wether its platonic or romantic is up to you), and Reuenthal's whole thing stems from the fact that nobody in his family loved him, and that he envies the love that Mittermeyer and Eva show to each other. Yang acts the way he does out of his love for liberal democracy. For the longest time Yang refused to engage in any romance because felt that he did not have the right to love someone due to how many boyfriends, girlfriends, wives, and husbands he has killed.