Mostly no. My younger self only had very general ideas about what he did and did not want to do with his life.
When I was a teenager I wanted to be a fighter pilot (Top Gun helped, but my interest was mostly stoked by any number of documentary programs I had watched, and aviation discussions with my ex-navy-pilot father). That interest faded a year or two after starting college, but I still didn’t know what I did want to do with my life, so at the end of four years, I started grad school, pursuing a masters degree in mech engineering. After nearly two years of that, my advisor asked if I had plans; I said no, and he invited me to stay on for a Ph.D. Not particularly wanting to get on with my life, I agreed. Four years later, I graduated and was kicked out of paradise into the real world.
That was fourteen years ago. Since that time I’ve worked in a nice, secure, stable (and sometimes boring) job as a scientist for the federal government. The opportunity was partly luck: my employer was looking for an ME with a graduate degree, and contacted my advisor, who recommended me. On the advice of my advisor, I acted almost comically enthusiastic during and after the interview, and I ended up getting the job.
If you had told my teenaged self that he would be getting a Ph.D. and working in a government lab, well, that was pretty far from being a fighter pilot, but I suspect that teenager would have acknowledged the reality that ending up as a fighter pilot would have taken long odds.
I had (and to some degree, still have) a problem with growing up. Getting married, having kids, owning a house - “settling down” - all seemed repellent to me.
At 32 I bought a house. My first house was an unpolishable turd, and I was glad to get out of it five years later, losing only ten grand in the process. My second house has been much better; the “growing up and settling down” aspect hasn’t been so bad, and I enjoy having four walls with nobody on the other side compelling me to keep the noise down.
At 35 I married. The decision took a lot of soul searching. Overall things have been good since then, although at times it chafes and I wish for the freedom and solitude I enjoyed as a single man.
Well, that’s two out of three. No kids. I’m ambivalent about that last one. It’s been nice being one of the kids at an extended-family gathering, but I struggle to imagine myself as a patriarch of my own family, and can’t imagine tearing down the life that I have and rearranging it for the next couple of decades to accomodate a small group of resource-intensive midgets with questionable judgment. On top of that, child-rearing seems weird these days (maybe just because I’m paying attention to it like I never used to?). It looks awfully challenging to steer a kid on a straight path past all the junk food, TV-overload, and internet porn. OTOH, I worry that when I hit my 60’s with no kids, my life might seem kind of vacuous. Either way, this part of my life is consistent with what I imagined as a teenager.