My list of underrated coasters in my opinion
. Viper (Darien Lake)
. Ride of Steel (Darien Lake)
. Gemini (Cedar Point)
. Maverick (Cedar Point)
. Thunderbolt (Kennywood)
. Blue Streak (Cedar Point)
. Silver Comet (Martin's Fantasy Island)
. Jackrabbit (Seabreeze)
. Whirlwind (Seabreeze)
. Extermintor (Kennywood)
. Drachen Fire (Busch Gardens Williamsbug; even though I never rode it, still I think it kind of an underrated coaster because if its sad sad fate )