I took music lessons of various kinds pretty much non-stop from the age of 3. First it was piano, then cello, then back to piano.
I started piano at the age of 3, and I don't really remember well what I was like back then. I've been told it was hard to make me practice. My teacher from then quit teaching, and so I had to change teachers at the age of either 6 or 7. When this started, I began to really hate practicing, and fought with my parents all the time and tried everything I could think of to get out of it. I only practiced once or twice a week because that was all the energy they had to make me, and when I did that, I set the microwave timer for 30 minutes, and the second it went off, I was out of there.
I finally quit piano when I went into middle school and my grades plumetted. But they moved me right into the cello, and it was pretty much the same thing. For a while during my lessons, my dad (an Aspie himself) would sit with me while I practiced and talk to me about what I was doing, and that worked well. But one day he snarled "I shouldn't have to do this" and stalked off and from then on refused to have anything to do with my lessons. About that time I had a disagreement with my teacher about how to hold the cello bow* and from then on wouldn't practice or work. I quit taking lessons when that teacher had to move.
I was off lessons for a few years. In my mid to late teens, I decided I wanted to take piano lessons again. And because I wanted to I guess, I never had any problems with practicing like that, and I even rode my bike to a couple lessons even when my parents weren't around to find out if I'd gone or not. I always liked making music, I just HATED being forced to practice.
*My hands are shaped oddly, and my pinky fingers are set really low on my hand, so that their tips only come to in between my first and second knuckles on the ring finger. Because of this I couldn't hold the bow without getting a severe cramp in my hand. I found a different way to hold it (bracing my 5th finger against the bow for leverage instead of trying to hold it down with my too-short finger), but my teacher wouldn't let me play like that. So I started refusing to play.