Grace, indeed, when one is happy because one's outside reflects what is inside for example, I think it shows.
For me, already just short of 7 weeks in which is still early on, I too notice that even when I react to regative things, it is much more subdued than previously, E and especialy P apparently calm me SO much, and all of my relationships are better than before I started HRT. It sounds similar for many girls here, and you too.
I find that for me, these mental changes are even more amazing than the physical changes. Sure, I was expecting at least SOME physical changes but even those have been like WOW (no more body odor, palms of my hands already silky smooth like that of a 25 year old cis girl, no more facial acne, my hair starting to grow nicely in my natural light medium brown color, and most important my "girls" and nipples are for sure now and are hurting sometimes so I think they will grow more right away)...
But the mental changes are stunning for me, and many of the changes are similar to what you describe for yourself.
I thought that, ok, I "understand there will be mental changes" at an intellectual level. Never in my wildest dreams did I see these feelings about how first-hand experience with this would be rapidly change me -- and the euphoric happiness seems to follow me nearly always, even when I get any (rare) negative news, I am emotionally in great shape.
This includes exuding "positive-ness" I think...which you allude to also.
Maybe people just sense this, and want to talk more to an enthusiastic, happy person than to a cynical person.
Plus, I think people in nearly every country just assume that females want to talk more than males. This is a "nice" stereotype which helps us "new" girls ('newly" girls on the outside, anyway, and then this maybe helps us feel more feminine on the inside, too).
Plus, females in general I think, in any country, are regarded as less "threatening" than males -- which helps to elicit a great quantity and quality of spontaneous conversation that last longer than just, "Hello, how are you?"
The world treasts female more gently than males, in so many regards.
Embraces Grace,
Johanna.