I ask because... I know there are MTF women who've had their SRS in their early 20's. I started HRT'ing in my early 20's! Twenty-three to be exact. I'm 26 now, and as much as I would very much love my SRS, I would prefer to have it sooner rather than later. I dread entering my 30's and just finishing my transition.
I was hoping to live my life in such a way that i lived many more years as a woman than i did a guy, but i didn't really want to live a long life. I was also hoping that when i'm (hopefully) born a girl in my next life that i live years longer than this present life.
Additionally, there's nothing for me as a guy. There's this whole other life waiting for me as a girl. I plan on attending a women's college (hence, why i feel i need to hurry up and transition!) and just... living a full life basically.
I would also like to... let's just say acquire my whole transition fund so i can just breeze through my whole transition at one time. I just hate being in this mental space where I'm jealous of others who've had their SRS at younger ages than i did. The day i have my SRS is certainly something i look forward to. That'll be the last thing i ever do transition-wise!