Obviously, I'd have all and any girl-parts GONE.
And then I'd be taller, no question about it. I hate being short with a fiery passion. After that, I'd want vision that didn't require glasses or contacts and maybe a little bit wider mouth. Also, I'd have bigger hands and feet. Other than that, I'm happy with the masculinity I have such far. I'm told I look a like young Elijah Wood and a young version of my father.
(Someone once told me I sang like K.D. Lang - on the one hand, I was complimented 'cause she's a wayy awesome vocalist, but on the other...maybe if they had compared me to a male singer? I so sing mostly in a tenor range.)