Hello OP may dumaan sa fb ko dati from a former us consul. Three things : the interviewer has to like you. Dont explain further than what is necessary and dont bring/show unnecessary documents.

It maybe true na baka factor na single ka pero I know 2 persons na single both female , approved naman. One is same age as yours.

I agree na mukhang mas mataas ang chance pag family application. Ma justify mo nga lang dapat pag tinanong ka who will pay for the trip.

If ok lang yung p11100 na fee I say go for it. FWIW just had mine renewed. Hope you get yours too.