I've stated my opinion on this many a time before but in terms of production, Don Juan had a certain vibe and aesthetic that meshed with tech's wordplay that set CBTS and The Worst apart from his later works...
the smooth, funk elements in the production that are found on both are still more to my preference and stay on rotation to this day. the same go for the fewer QDIII tracks... would've loved to hear more of that
on a side note, came across DJ's myspace and thought it was interesting to see who was in the 1st row of his top friends...
http://www.myspace.com/mizeryent
EDIT: didn't notice the last login date, but nonetheless still find it weird as to why he would have tech in his top friends in that period of time