I worked with three "millennial" couples last year to buy. One couple bought a condo in Clinton Hill, another a condo in Park Slope, another a co-op in Clinton Hill.
I think that might be an interesting angle. "Millennials buying in BK"
I had another couple who both work for the UN who actually had two accepted offers elsewhere and backed out because of "concerns" about neighborhood/right apartment. They literally kept seeing what were "better" apartments and the one we got was a crazy bidding war for a listing saved 300+ times on Streeteasy. Third time's the charm!