Curious--your favorite architecture?

Most people here use the S/360+ architecture for their
assembly language programming.  I was curious what people
think of other common architectures, both previous and
subsequent to S/360.

For instance...

AS/400 LIC (whatever that is)?
1401/1410 Autocoder/SPS?
709/7090 (word oriented)
x86 (all variants through Pentium)
1130
S/360+ supervisory state
CDC 6xxx series
Univac 1100 series


(S/360 includes all subsequent models)