Depersonalization: I don't have much experience with this one.
Derealization: I've been experiencing this one a lot recently. I don't know if it is bad. People have been talking to me and it feels like I'm in a dream. Or I'll be walking and I have no idea what's happening or what I'm doing. It's affecting me. My eyes have been glazing over a lot more often. Maybe I'm just bored. I have no clue. It happens way too often to be boredom though.