Your first coaster from each manufacturer

[Raccoon]

B&M-Medusa
Intamin-V2(SFDK)
Arrow-Corkscrew(Silverwood)
Vekoma-Boomerang(SFDK)
GCI-Roar(SFDK)
Premier-Poltergeist
Mack-Technic Coaster(Legoland California)
RMC-Goliath(SFGAm.)
Gerstlauer-Pandemonium(SFDK)

 

[CanobieFan]

Adding to mine? woo

Allan Herschell Company - Little Rickies Little Twister - Six Flags New England (Riverside)
Bailey - Pipeline Express - Wild Water & Wheels - 2013
Big Country Motioneering - Ultimate - Lightwater Valley - 2006
Cavazza Diego - Nessi - Coney Beach Pleasure Park - 2006
CAM Baby Kart - Der Zug des Manitu - Wiener Prater - 2004
C&A - Tren de Potosí - Isla Mágica - 2007
Coaster Works - Dania Beach Hurricane - Boomers - 2008
Cobb - Riverside Cyclone - Six Flags New England (Riverside)
Custom Coasters International - Excalibur - Funtown Splashtown U.S.A. - 1998
D.P.V. Rides - Kukomotív - Vidámpark - 2004
E&F Miler Industries - Great Chase - Six Flags New England (Riverside)
Fabbri - Pole Position - Fiesta Shows (traveling New England)
Fredrick Church - Dragon Coaster - Playland Park - 2005
Gerstlauer - Mr. Six's Pandemonium - Six Flags New England ((BUT Twisted Twins had my first G-Trains)) - 2004
Giovanola - Goliath - Six Flags Magic Mountain (For a NON-Intamin GIO) - 2009
Great Coasters International - Roar - Six Flags America
Hopkins - Polar Coaster - Story Land
Horace Cole - Tyrolean Tubtwist - Joyland Amusement Park - 2006
Intamin - Disaster Transport - Cedar Point
International Amusement Devices - Colossus - Six Flags Magic Mountain - 2009
Interpark - Looping Coaster - Funtown Pier - 2005
Irvine Dragon - Hullámvasút - Vidámpark - 2004
Mack Rides - Journey to Atlantis - SeaWorld Orlando - 1998
Overland - High Speed Thrill Coaster - Knoebels
Philadelphia Toboggan Company - Yankee Cannonball - Canobie Lake Park
Pinfari - Super 8er Bahn - Wiener Prater - 2004
Premier Rides - Flight of Fear - Kings Dominion
Rocky Mountain Construction - Outlaw Run - Silver Dollar City - 2013
Safeco - Ramses - Parque de Atracciones de Zaragoza - 2007
S.D.C. - Rockin' Rider (Galaxi) - Canobie Lake Park
S&S - Hypersonic XLC - Kings Dominion - 2002
Schwarzkopf - Wildcat - Cedar Point
Setpoint - Pteranodon Flyers - Universal Studios Islands of Adventure - 2000
The Gravity Group - Hades - Mt. Olympus Water & Theme Park - 2005
Togo - Shockwave - Kings Dominion
Valdemar Lebech - Rutschebanen - Bakken - 2014
Vernon Keenan - Flyer Comet - Whalom Park
WGH Transportation - Dragon's Apprentice - Legoland Windsor - 2006
Wisdom - Go-Gator - Sam Pino (traveling New England)
Zamperla - Dragon - Canobie Lake Park
Zierer - Firefly Roller Coaster - Benson's

Bold are new additions.

 

[Tomatron]

Pinfari - Klondike Gold Mine
Arrow (Pre-S&S Merger) - Vampire (Chessington)
S&S - Dodonpa
Vekoma - Corkscrew (Alton Towers)
B&M - Oblivion
Intamin - Shockwave (Drayton Manor)
Mack - Runaway Mine Train (Alton Towers)
Maurer Sohne - Rattlesnake (Chessington)
Gerstlauer - Speed: No Limits
Schwarzkopf - Black Hole
Zamperla - Buffalo Coaster
Soquet - Twin Looper
Giovanola - Goliath (SFMM)
Togo - Sky Rider
Premier - Speed: The Ride
Zierer - Space Invader (Blackpool)
Morgan - Steel Dragon 2000
Reverchon - Some awful Spining Mouse at a New Brighton travelling funfair.
Pax - Forumle 1 (Parc Saint Paul)
Fabbri - A spinning mouse at the SECC Irn-Bru Fair, or whatever it was called.

CCI - Tonnerre De Zeus
GCI - Gwazi
Coaster Works - Dania Beach Hurricane
The Gravity Group - Hades

 

[Gavin]

It's really hard to actually know for sure as I don't keep a coaster count in any kind of chronological order, so a lot of these will be guesses. Not that it matters in a list topic that nobody will read. Anyway, the vast majority of these will fall under "probably".

Pinfari - Jet Stream (Ocean Beach, Rhyl)
Arrow - Steeplechase (Blackpool)
S&S - Dodonpa
Vekoma - Big Thunder Mountain (Florida)
B&M - Nemesis
Intamin - Shockwave (Drayton Manor)
Mack - Runaway Mine Train (Alton Towers)
Maurer Sohne - Wild Mouse (Flamingoland)
Gerstlauer - Rage?
Schwarzkopf - Runaway Mine Train (Ocean Beach, Rhyl)
Zamperla - No idea
Soquet - Papillons d'Alice
Giovanola - Goliath (SFMM)
Togo - Geopanic
Meisho - Atomic Coaster (Seoul Dreamland)
Senyo Kogyo - Double Loop (Seoulland)
Premier - Flight of Fear? (no idea which one was first)
Zierer - Flying Trapeze? (Flamingoland)
Morgan - Steel Dragon 2000
Reverchon - Crazy Mouse (Brighton)
Fabbri - Space Mouse (Fiabilandia)
Golden Horse - Spinning Coaster (Sun Park)
Beijing Shibaolai - Jungle Mouse (Sun Park)
Beijing Jiuhua - Children Coaster (Shenzhen Children's Park)
Hebei Zhongye - Longfeng Roller Coaster (Chuanlord Holiday Manor)

CCI - Megafobia
GCI - Lightning Racer?
The Gravity Group - Voyage?

 

[CanobieFanatic]

PTC: Yankee Cannonball
Arrow: Canobie Corkscrew
Zamperla: Dragon
Intamin: Bizarro
B&M: Batman: The Dark Knight
Gertslauer: Pandemonium
Vekoma: Flashback
Zierer: Verbolten
Maurer Sohne: GCG
Premier: CW's Backlot Stunt Coaster

 

[Imagineer Josh]

Great thread idea! I'm surprised it stopped.

PTC - Little Dipper at Six Flags Great America
Arrow Dynamics - Adventure Express at Kings Island
B&M - Batman The Ride at Six Flags Great America
Intamin - American Eagle at Six Flags Great America
Vekoma - Flying Ace Aerial Chase at Kings Island
RMC - Goliath at Six Flags Great America
Gerstlauer - Fairly Odd Coaster at Nickelodeon Universe
GCI - American Thunder at Six Flags St. Louis
Wiegand - Goats on the Roof
Premier Rides - Backlot Stunt Coaster at Kings Island
Dinn Corp - Georgia Cyclone at Six Flags Over Georgia
CCI - Pegasus at Mt. Olympus
Gravity Group - Hades 360 at Mt. Olympus
Zierer - Pepsi Orange Streak at Nickelodeon Universe
Schwarzkopf - Whizzer at Six Flags Great America

 

[Zek_Teh_Kek]

Intamin: Jr. Gemini
B&M: I forget
Vekoma: Woodstock Express
Arrow: Iron Dragon
PTC: Woodstock Express @KI
Dinn/KI: Beast
E&F Miller: Great Pumpkin Coaster
Zierer - Verbolten
Premier: Backlot Stunt coaster
Swarchkopf (best spelling ever): Wildcat at CP