Usually, they would be either about to graduate, or else they had graduated a couple of years earlier and had just worked steadily since then.
They would have zero hobbies. They would listen to top 40s music but couldn't name a band, sometimes watch a movie (but didn't care much what movie), didn't have opinions on things, had almost no stories to tell. They didn't have ideas about what to do on a date. They were awkward. Our date would almost always be the first they had been on in a long time.
It was like they postponed becoming real people in order to become excellent students and professionals. I get that - their programs are HARD. What a high cost though.