So as the title says..... 

I personally would be more confident around people are probably revise a bit more. What would you do differently?

Everything.

Get involved in racing at ~age 10. I pretty much screwed myself by taking so long to pursue a passion.

Not get hit by a bike when I was 8 years old that didn't let me run and play sports for like a year because my leg got infected and stuff...

I know I used to play outside a lot and it changed because of that. Plus, we got a computer, some floppy disks, and emulators + roms... And here I am now.

In other words, maybe I would have become a professional hockey player or something.

I'm sure that's not the case. Could you pinpoint one factor?

I would have chosen a different major in college..

Education is never wasted....only gained. All "skillz" are transferable and will give you advantages over other candidates.

Hope that made you feel better

We barely have live life yet, so why pose such questions?

Just relish on the chances of making the change

Well, this is a bit tricky. Considering that a change at the age of 11 might make me not know how it ends up at 27, so I can't change something then, you only really have the ability to make a major change once. After that, your life will be different, so you might not end up being in the later situations.

Changing a situation is a bit tricky. The first thing that comes to mind is stopping playing tennis at the age of 11, as I caught an illness and me continuing playing tennis made me get a long time illness that semi-incapacitated me for the entire rest of the period.

On the other hand, that illness made me who I am today. If I hadn't faced that, I would most likely have become an overconfident, oversucessful person who had never met any real trouble in life. I could quite easily have become an arse.

Essentially, there's nothing little enough for me to worry about it now, and all the bad stuff is stuff that happened to me, not stuff I did. If I changed it, I would also change, and I'm perfectly happy with the current me.

I wouldn't really change anything.

Whee, my first double post on this account. How exciting!