In no particular order:
Diamondback (KI)
Millennium Force (CP)
The Voyage (HW)
Expedition:Everest (WDW:AK)
Beast (KI)
Maverick (CP)
The Raven (HW)
The Legend (HW)
Goliath (SFMM)
Riddler's Revenge (SFMM)
Hmmm, good question... I know when I had them was sometime in 2003 (I was actually in Puerto Rico). Not sure how long before that or how long after that they continued producing them, though.
Once for a limited time (and from what I hear, they're still around SOMEWHERE) they sold caramel M&Ms... those things were like sex. I have to go with those.
Peanut Butter runs a close second though!
Only Holiday World and Kings Island. Will probably make it out to a few of the Vegas coasters in December, but those don't really count as "parks," I guess.
Awwwww, not Demon Drop! I've had many fun rides on that thing over the years... especially in the past few since basically no one rides it anymore so multiple rides in a row are not only a possibility but expected. Ah well, hope something worthwhile will go in in its place.