Miguel, it's not a matter of you liking crap. I think it's your listening habits. Since you listen at very low volume levels, you enjoy more cans delivering a bit of enhanced bass and crispier high frequencies. The R10, not even the "bass heavy" ones, weren't ever bass monsters. I believe the extra bass in the D5000 serve you better than the extra midrange richness and treble smoothness of the R10.
For "normal" (ahem) people listening at "normal" volume levels is quite understandable they prefer the R10 though.