Everyone pretty much answered it perfect. My uncle told me the same thing. He's a gay male who has the attitude of "he knows all in the glbt community". He also often makes comments that no trans man can be a real man. However people like Jet, Kyril, and many of the other guys, who's names escape me right now because I haven't slept yet, have proved him wrong.
Things I didn't see mentioned. Your junk will grow, your sweat scent will most likely change, sometimes your hair will get coarser. Look up trans guys on youtube and watch the vids. Many of them list changes and things such as the voice you can actually hear and see.