In both VF and VF2 I generally take the first proposal that comes along. I'll adopt a Definitely' always, without worrying to much about their other attributes. That's assuming the family has one, of course. That means that I've quite often had a 'Definitely' and a 'No Way', and have found that they'll often still have large(ish) families. Two 'No Ways', though ...

I've also got a theory that the first time a new couple try for a baby they'll often get one and with the minimum of fuss. It's only my theory though.