Roasted Peppers

Tried roasting my own peppers instead of buying those little cans. Used a stove top grill and roasted some Anaheim peppers. I'm not too familiar with peppers (except the usual bell) so I was surprised that these weren't spicy at all (aren't all Mexican peppers supposed to be hot?) The ingredients on the can simply state: green peppers. That doesn't help too much! I'll just have to keep trying different varieties...unless anyone out there knows???