well my favorite by default is my 63 NovaSS if you consider it a "true" musclecar. if it wasnt when it was brought out of the factory, it is now.
but my other favs are ZL1 Chevelle and Vette. 63 Split-window Vette. All Yenko cars. Tri-5 Chevys. Hemi Cuda....ahhh fuck it, this is gonna take too long as i like damn near everything