When I was buying my ticket in Munich, a guy behind me heard where I was going and said, “Good luck” . Before I could turn and ask him some questions he was gone. Oh, how I wished I would have spoken to him!
For me, one big trigger with respect to a woman’s suitability is her ability (and desire) to write. For me, communication is very important, and I find in most cases, it is far more difficult for a woman to deceive with a well written letter (form letters do not fly in this situation, because the woman must communicate, not just talk at me, as you would find in a form letter from a scammer). It took about a month to bring the field down to 3 women. After another month I was down to one, and very happy with the progress at that point