I'm currently pursuing my PhD, late 20s. Gotta say it's hard. I've talked to a few of my guy friends about this. They prefer girls who have more time on their hands.."for the kids" as they put it. A teacher is one of their favourite. My guy friends are PhD students too and oh boy they're such rarity. Most of my medical practicing friends date those from the same field. Be it another MD or a nurse. But who knows, may luck be on our side