10 year old me didn't have much expectations about the future but I'd say 15 year old me would be most surprised about the fact that I have a girlfriend. If you were to then tell me that not only do I have a girlfriend but I also have a house and the truck I've always wanted it would literally blow his mind.
Yeah 10 year old me didn't have much thoughts about the future. Similar but not the exact same as you, but 15 year old me would be surprised that I have someone in my life who considers me a friend. 15 year old me would probably be disappointed that I didn't go to med school, but imo I make decent enough money.
I'm glad things are going pretty good for you right now. :)