Life Choices

Not to be so introspective, but I have a question/discussion for you, my readers:
What key moments in your life made you realize that you were/were not on the right path? Okay, let me put myself out there a little. As you may know, I am 25 years old and still in college. I never left, I never took a "break," and I don't have children. I am just what you might call a career student. However, I don't want to be anymore. I will be completing my Master's in December, and am on the edge of the rest of my life. I am extremely nervous and anxious to be out of school. Nervous because sometimes I really doubt my abilities in the real world, and anxious because I am so ready to be out of Starkville, out of Mississippi, and just someplace else.
After 2.5 years of college (started right out of high school), R decided to put school on the back burner to help support me through the remainder of my Bachelor's and into my Master's. I whole-heartedly hope that he realizes how greatful I am, and will always be, for that. Because of his sacrifice, we have 2 reliable vehicles, a home (that we OWN), several happy pets, and memories of a few amazing vacations. We also have a discontented husband who feels like, at 25, he is unaccomplished and going nowhere. THE PLAN, as we call it, is for me to finish school, get a job, move, then it will be his turn to finish school. Most likely he will not return to a regular 4-year program, or Biochemistry for that matter, but it is his dream (and mine) for him to earn his degree. I have all the faith in the world that (once he decides what he wants to do) he will excel.
As for the question I asked, here's how I feel. I grew up knowing that I would go to college. Now, I did talk to a few recruiters and joined ROTC for a year, but I just knew that the military was NOT for me. And, I never had a job until the summer after I graduated from high school. The focus for me was school, and I was not allowed to work. So, entering the workforce was not really an option. I knew school, I had been in school since I was 5, so college was what I was going to do. And, I loved it (love it still). I did well in my classes, I made new friends and reinforced old friendships, and I grew as a person. But, into my junior year I started to get nervous about graduating. I mean, really, who, with a bachelor's degree is really ready to start their career? I wasn't.
So, it took me another 2 years to finish (total 5.5 years). Fortunately, I wound up at this lab job, loved it, and was invited to get my Master's there. That was my answer, I wouldn't have to leave school just yet. Here we are, 2 years later, and only 6 months away from graduation. I have learned, accomplished, and grown so much in the past 2 years. I realized that I DO NOT want to be a college student forever (no more homework, no more books, no more teachers' dirty looks). We will be celebrating our 2nd anniversary this fall, and I realize that I DO want to have a nice home and children (one day).
At this point in my life, I am also starting to feel the added weight of R's sacrifice. I will be the one supporting our family. Until he finishes whatever program he chooses. And, I will not pressure him to hurry up! He deserves it! I owe it to him! Not just because we're married and I have to, but because I love him, he's been such an amazing provider and supporter! I want him to feel the same pride and accomplishment that I do--about starting something and seeing it through!
I guess what I'm curious about are the choices that you (or your significant other) have made as a long term investment in yourself/your family. Do you have children? How did you know when you were ready to have them? Are you a working/stay-at-home parent? What sacrifices did you/they have to make? Do you feel regret/guilt over it? I know it's very personal, but I just needed the therapy of putting my feelings out there, and curiosity (the voyeur in me) has me asking YOU.