Tough one. Could say E39 because dad had a 528i until I was 5, could say E46 M3 in Laguna Seca because it's still a dream car, could say E64 M6 convertible because V10 in a car that's more art than vehicle, E92 M3 ZCP SG/FR because that car also covered my walls until some "life changing" stuff happened in a young boy's life. When I thought I found something "better" than cars
All in all though F90 M5 Comp has to be my take, imo its the most beautiful car BMW has made in a while, definitely the only good looking G-body. Stratus Gray/Aragon Brown please!