It's a good question. It depends on a lot of variables.
1. How well I know the person
2. How close we are physically when talking
3. How serious the topic is
4. What is going on around us while we are talking
5. And of course, if I am talking to a woman, how attracted I am to her
I don't like when people do not look in the eye ,
it's a lack of franckness .
for my job i use to have contacts with many guys from mus/lim countries ,
During a negotiation , when they are talking with me , some of them (not all ) prefer to look around or at the ground rather look at me ,
is it because iam a woman ? Certainly yes.
i feel umconfortable.