For me it has to be the LMP / LMC and the old GT1 class.
Love to drive the CLK - LM '98 but due to only a small amount of GT1 cars I am often chasing the faster classed cars. The Audi R8 '01 and '05 are my main Le Sarthe cars. If I was a better driver I would use the Toyota TS020 as my main race car.