Straight up? You take what you can get female-wise. Does it bug me occasionally that I'm 5'9" (I'd love to be petite framed and 5' 2"), will never look like a supermodel, and can't get pregnant? Sure it does, but things like that need to be taken into account before you even start to transition. That's just the way it is medical technology-wise. Maybe 40 or 50 years from now, medical technology will advance to the point where the above mentioned three things are possible for a transsexual to have. Still, I think even if, that is so, there will more than likely be other things that cause unhappiness transition-wise that have nothing to do with the physical side if things (for instance - "why can't I act like, and interact just like a natal/cis-woman") - as human beings, we have a tendency to suffer from the "grass is greener on the other side" syndrome. From a looks standpoint, not all cis-women look great, I've know some who looked pretty nasty. Comparing yourself to cis-women can spur you on to do better in your endeavors to pass, but past a certain point, it becomes self-defeating, and can only make you miserable (this comedian explains quite well how comparing yourself to others in general, can be a losing proposition [yeah, it's one of the Prager University vids on YouTube, but the guy makes some good points, so please try not to get bent out of shape if your political leanings are leftward - the vid is non-political in nature, it's just about a life related issue]).
It may be hard to do, but comparing yourself.....to yourself, is what works best in an emotional sense.
To (I hope) paraphrase what others have said, transitioning will not make life perfect/wonderful 100% of the time. I still have to pay the bills, I'm still kind of a dweeb at times, and I'm basically a frumpy (albeit quite passable) middle aged woman. But guess what? I'm a much happier, better person, than that mega messed up person I was back in the late 90s, who was so suicidal, it was looking like I was never even going to make it to the year 2000. Transitioning, and my SRS are best things I ever did for myself in my life.