Being able to go to the gym and wear a 1piece suit to swim -- I hate the in-between of now where my breasts are clearly not those of a guy but my downstairs makes suits shaped for women unworkable.
Never having to go into a men's locker room or toilets again, those are the places I've felt most uncomfortable all my life.
Having a vagina and having another woman go down on me or fist me. I miss ejaculations and my libido, I look forward to a body that better fits my (still new, still learning) feminine emotions.
I look forward to having the option of passing, I can't imagine I will do so every day but having it be possible would help.
Some things that I want and can't count on --
My gf of 18 years becoming comfortable with my feminine body.
The acceptance of my first daughter of the changes. This one is hard, she's known I'm trans for a long time and has always wanted a "don't ask, don't tell" approach which makes me sad. She's been away working on her master's degree for the entire time I've been on hrt and so I will need to come out with her before her next visit.