The best processor is going to be different based on
the person
you are talking to. Everyone has their own idea as to what
features are important, and fond old memories of working on
an ancient (wasn't then) OS tend to sway their decision.
That was implied, but I'll reiterate: What platform (includes implementation) do you
think was really neat and why.
P.S. The VAX had problems quote was mostly to illustrate that all computers can be dissed.
Somebody asked why: mostly implementation.
The original VAX was very instruction-heavy, but DEC did it right and started offloading
to "heavy microcode" (read emulator). However, some
VAXen designed in 1992 were still using Q-bus for main expansion. 'Nuff said.
Implementation. There are other little bits like this.