The effects became very different in larger dosages, but in the smallest doses, I'm not sure I could explain or notice any difference.
I did have, for most of my life since childhood, what I would feel confident calling strong ADD indicators. The two psychiatrists I've spoken with agree with me, and while I didn't get this deep into the conversation with them, my personal feeling is that like many things it's a spectrum[1], that all humans are at least somewhere on that spectrum.
I did struggle to maintain a job and a home prior to being medicated, and since have been gradually moving towards a life that's normal and happy for me.
YMMV.
With too much adderall, I'm still in a very content place, no anger, and amazingly "productive", but afterwards very dissappointed with my previous enthusiasm for what now seems in retrospect obviously not such a smart direction to be productive in.
I recently did some research on Adderall, methylphenidate, modafinil, and selegiline as I'm diagnosed add-inattentive, ran out of insurance and thus medical care and scripts. I was looking for nonprescription alternatives. This is a fascinating alternative. Also, from what I learned, Adderall is a horrible substance. It's way stronger than even cocaine. I'll never touch it again, especially considering the alternatives available.