Well... I honestly don't know any of these mazes and am actually a bit sad because Nightmares, the Vampire one (forgetting the name at the moment) and Underground were staples for me for several years! Either way I never had outstanding memories of Haunt. It was always either "go early" and half the monsters were missing or "go late" and everything had a 2 hour line! Also I would usually come home with my ears ringing, not from my screams, but from the screams of all the teenage girls who screamed at ANYTHING including each other!
My favorite memory was in Ghosttown. A "slider" decided to scare a group of girls so he ran and slid into them. I like to call it "cheerleader bowling". Instead of everyone running... they all froze, then fell on him as he took out the whole group. It was a strike btw... no spares at all! Even now that memory makes me laugh!