I read an article in college once, it suggested that a man who goes through a mid life crisis, is prone to crisis earlier in life. And men who tend to handle things and maintain steady non drama like lives, are less apt to go through it.
I think its an industrialized phenomena. I don't think men in 3rd world countries have the luxury of a mid life crisis.
Believe it or not, I tend to take an almost opposite approach to the dream than you do. My dreams have changed as I grow. If I chased every dream I would never get anywhere. heh. But mostly I think we are different because I have children and you don't.
When I chose to have children, my dreams began to center around them, while my more self centered dreams were put on the back burner.
I don't feel jipped. And I doubt most of the people at your wife's parties feel jipped either. In fact, some of them may feel like you do, about you. They may think you are really missing out in the full life experience by not having children. (I don't necessarily agree with this, but I do know some people feel this way.)
When I go to reunions and see people still chasing something at 40 that they were at 18, well, I tend to think...wow, if it hasn't happened by now, it ain't gonna. Move on. Grow up and get some adult, and more to the point, achievable goals.
Now I am not saying that to you in anyway. I say this because my dad chased a music career from about 14 to almost 55. He chased it hard, forsaking family, forsaking all else in the pursuit of this career. He did keep a job, always, but resented it a bit because it took time away from his dream.
There is nothing worse, to me, than seeing some old guy up on a stage trying to be young and sound hip, trying to be something in his 40's that woulda fit better in his 20's. (I admit I am VERY biased about this though.)
To me, someone shoulda told my dad to grow the hell up, instead of encouraging him to chase this thing that never materialized into anything substantial (and secretly laughing behind his back). Worse, now in his old age, he has NOTHING. Not even the cold comfort of "I told ya so's" because he was so busy chasing his dream he never built any real relationships. Not any honest ones.
So yeah, I am a little bit reserved when it comes to telling people to follow their dreams. When other people, like children and wives, have to pay the price for a dream that isn't theirs...well, then its the height of selfishness.