For myself I absolutely hate being told I'm masculine. Now, this tends to come from people who mean well but it's one of those things that REALLY gets under my skin. Usually the person's intention, or meaning is "you look male" (typically meaning I could see you as being cis). I know that I'm not masculine. I don't identify as masculine or with masculinity. I'm male, and to me there's a huge difference to the two and how I take it. Somebody saying that I'm male...well, that's fact and what I am. Somebody saying that I'm masculine would be...well...wrong.
It just frustrates me partially because before I transitioned I was seen as a masculine woman (I'm still seen as a masculine woman but that's neither here nor there) but I never really felt masculine (or a woman for that matter). So when a person says "you look masculine" I see it more so as saying I don't look like a male (although since I am male I always look male lol), or I look masculine [for a woman].
Does anybody else feel weird or bothered when called masculine?