We should make a general topic about this.
I've been racing since the early 90'ies (my god I'm getting old !

) and my favourite car remains the Schumacher CAT2000EC. I couldn't put a wheel wrong with that car. It brought me to a 5th place in our national championship and it put me in the E-final of the euro's in Barcelona in 1997 (doesn't seem much, but I'm still very proud of it, considering it was all privately funded on a student budget

). I's a shame Schumacher gave up on 4WD off road cars.
My favorite 2WD is a bit more difficult to determine. I'm doubting between the very first Losi XX and the AE B3 with a slight advantage for the XX given it's revolutionary design for the time.
BTW, I still have both cars (the CAT2000EC and the XX). I couldn't sell them