Wall of text warning.
I figure I'll post my opinion on this since I voted on both of those questions (and inconsistently) and I'll preface this by saying the obvious: close votes are essentially opinions and as mentioned before, opinions change.
When I vote to close questions I try to keep the community feeling in mind. To help explain that I'll need to go back into GD SE history. In the beginning when the site was in beta we would get a lot of technical support questions and in those days most of those questions got answered. In a beta period especially you need questions and answers to thrive so you can't be too picky and the community hadn't gotten fed up with the technical support questions yet.
Nowadays technical support questions get shut down pretty quickly. This is for two reasons (in my opinion). First there's now site policy around tech support in the sense that we don't want non-design related questions on the site. Second, the site gets more traffic and has a lot more tech support questions float through and the community doesn't want to play tech support.
I realize your question isn't tech support but it relates to the community feeling point.
The questions, objectively speaking are opinion-based, which in my opinion (ha), isn't always a bad thing because design itself is in a lot of ways opinion-based.
For the record I voted to close the Segoe UI question and voted to keep the Gotham question open. I realize these two votes contradict one another, but here are my reasons. I voted to close the Segoe question because objectively speaking I do feel it's too opinion based for our format. But I voted to keep the other one open because it was already older and still open and it had more than a few positive votes.
Personally I take into account the popularity of the question. I think if a question is popular, even if not entirely within the site scope, is obviously still a useful question to have around because the community wants it.
I do try my best to evaluate each question independently of previous close votes which admittedly makes for more inconsistent voting and I'm just human as well and my personal opinion and feelings get in the way at times.
P.S. I have no personal issue with the font questions, but recognize they aren't as welcome here and vote in that direction.