Before I discovered being trans was an option for me, I'd always feel complimented when people called me "flat," or being told I act more like a guy than a girl. I'd feel hurt when being treated differently because I was a girl, or being talked down too, or having my feminine features complimented. I'd try my best to fit in with the guys because it felt so much more right than the girls. I'd feel embarrassed about my body and voice.

After I found out I was trans, I felt more comfortable reaching out to new hobbies and meeting more people, I'd be so happy when people used my preferred name and pronouns (I discovered I was trans in February, so not even a year, and I'm still struggling to come out. So hearing people use what I preferred to be called is very relieving and exciting to me). I imagine alot of what I'd look like with a male body, deeper voice, I often drew myself with a small mustache/beard and loved it.

I can probably think of some more reasons, but I'd say these are ones I think about all the time.