As someone who has ADHD and has taken stimulant medications for a long time, I would like to share my experience. There is a very faustian aspect of taking these medications. Don't think that you can change your brain chemistry and not change who you are.
I would not have the career I have today without it. Before I started getting treated, I was barely supporting myself financially, and struggling to get through community college. I felt so powerless, while my peers rocketed ahead of me. After I started taking medication, I was able to take control of my life, and do things I had previously ruled out doing. I did great academically, and then made more money than I ever thought I would. It was such an amazing feeling to feel like I had been given a second chance at life.
However, it changed me, and I lost something. I wonder what could have been. I remember the moment I noticed I was changed. For a year before I started taking it, I had been dating someone for over a year, and not once had we ever had a fight. But a month after I started taking adderall, I screamed at her when I got frustrated because she changed plans we had made. I was so horrified, and I wanted to stop taking it that day, when I still could. Our relationship didn't last three more months. I gradually lost touch with my old friends.
I was only supposed to take it to get through college, but the choices I made on adderall were such that I chose a lifestyle that required it. I pushed myself really hard for years and I was able to prove that I wasn't a slacker or stupid; I got a fancy .edu email and coauthored scholarly papers and presented at conferences.
I miss who I was before I started taking it. Things just didn't annoy me. I was so cool with stuff. I think I was much more emotionally resilient, and much better able to read people. Stimulant medications make me more "autistic", for lack of a better word. I think I have really regressed emotionally.
I would strongly advise anyone who starts taking these medications to not lose touch with yourself. See a therapist, even if it does not seem necessary. Try to maintain relationships and keep yourself emotionally anchored. Give your soul room to breathe. Take emotional sabbaticals where you are able to ruminate on important decisions. Consider not taking your meds on the weekends. Listen to music and play video games, even if they don't seem to entertain you as much. I have a theory that your "right brain" still likes these things, but that your impulses for entertainment are just suppressed.
As for me, I am seriously considering trying to live without these medications, or at least severely cut them back. Besides the problems that I talked about, there is also evidence that stimulant medications can reduce brain mass over the decades. I don't want to discourage anyone from doing the best for themselves, but everything has a cost. If you want to do well in college and build your career in your 20s, that is understandable. But keep yourself grounded.