A positive I've found... since coming out to some friends and my sister... I feel calmer, better about myself and what I'm doing in my life to change my body to fit who I am. I haven't made it far in my transition yet, hell, I don't even have a therapist yet (small towns suck)... but to know that I am taking steps, even if they're small (like joining Susan's) makes me feel better about myself. I used to -pray- that I would get breast cancer, just so I could get the damn things cut off and not have to worry with them... now that I know I can get a masectomy anyway, it doesn't seem that bad (though I still hate looking at myself in the mirror without a shirt on).
For me, the best part of being a transguy is... being a transguy. I hate my body, I hate being terrified to tell my mom... but I love knowing that this is who I really am, that I've found myself, and that I am going to stop pretending to be someone I never have been and I never will be again.