I am way more attuned to the smell of people now, particularly men. Men smell different than the rest of us
But, that's a good chicken-or-egg question, did my smell awareness change first or did my body scent change first? I really don't know, but I probably became aware of scent differences first. I remember during the first few months of HRT, I thought I had developed a body odor. But, after a while I realized that I only smelled it when I was around men and that they were the ones that were having the odor. I wouldn't notice it around women, and maybe it was a synergistic effect of men smelling different combined with my female scent. But, I have a hard time smelling myself, I don't detect much of an individual scent.
And now when I kiss a guy or get really close that way...wow, total man scent overload!