Not including those already in FM7. Although, if there are any that were in past instalments, have been removed and are not on this list, then bring those back too!
From the UK: Cadwell Park, Croft, Donington Park, Goodwood Motor Circuit (and the FOS Hillclimb), Knockhill, Oulton Park, Snetterton, Thruxton, Isle of Man TT
From the rest of Europe: Red Bull Ring (AUT), Zolder (BEL), Brno (CZE), Pau (FRA), Magny-Cours (FRA), Paul Ricard (FRA), Oschersleben (GER), Norisring (GER), Lausitzring (GER), Mondello Park (IRL), Imola (ITA), Zandvoort (NED), Estoril (POR), Portimão (POR), Jerez (ESP), Valencia (ESP), Aragón (ESP), Ascari Race Resort (ESP), Valencia Street Circuit (ESP), Istanbul Park (TUR), Monaco GP (MON), Baku (AZE),
From Australia/New Zealand: basically all tracks from the Supercars Championship, past and present!
From Asia: Bahrain International Circuit (BAH), Shanghai (CHN), Buddh Internation Circuit (Ind), Macau Guia Circuit (MAC), Tsukuba, Motegi, Aida, Autopolis (all JPN), Sepang (MAL), Singapore Marina Bay, Korea International Circuit
From Africa: Kyalami (RSA), Marrakech Street Circuit
From US: Barber, Mid-Ohio, Belle Isle, St Petersburg
From rest of the Americas: Buenos Aires (ARG), Interlagos (BRA), Mosport Park (CAN), Circuit Gilles Villeneuve (CAN), Autodromo Hermanos Rodriguez (MEX)
Also, whilst it's not a real life track, I would like to see a version of Edinburgh's Princes Street Gardens circuit from FH4 (and an old Project Gotham game I believe) make it into FM8