I sure can't binge on MDA.. and it's been shown to be more damaging than MDMA. I feel fucking drained after a night on MDA, the comedown for MDMA usually doesn't start until a few days later.
I too have taken more meth bombs than I care to remember, there was a time around here that the dealers would just sell the pills as meth because everyone already knew and didn't like being lied so, especially since most people didn't care anyway. The comedown from those pills was usually AWFUL though, but I assume that's only because it's some nasty bathtub meth too gross to sell on the street. Just mix it with some pill binder and dye it blue and no one is the wiser, though... Also the fact that I would stay up for 36+ hours after my last dose and that I wouldn't eat anything the entire time obviously contributed to it a large amount, but that's extremely common when using amphetamines.
to be honest though, oral and even snorted meth is completely different from smoking/shooting. There's just this tinge of evil that comes from smoking a bowl of crystal, bad shit all around. Oral meth is a much easier habit to control, but that's likely because a large amount is converted to amphetamine