My Mom was a die-hard All My Children fan, so I remember him as the mostly but not entirely villainous Adam Chandler.
I’m still pissed they cancelled it (along with OLTL). They briefly revived both for an online series. Canary appeared briefly in it (Susan Lucci did not), but he wasn’t looking well.
My mom watched it too, when I was a kid I’d sometimes watched a little with her. As I recall he played twins, one seemed evil and the other was like retarded or something.