Motorolla 68060, 6809 (or Hitachi equivalent).
Not a single x86 cpu makes it anywhere near my list of favorites.
Not sure how many people realize it, but x86 is actually pretty crap.
Anyone who has done any asm programming for multiple arches will say the same. Horrible ISA, still crippled by its legacy, (way, way) too few gprs. Even when with the 64bit extensions it's still less than decent ISAs had back in the 90's.
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The fact that it's been pushed as far as it is is quite impressive, but they do influence our experiences and are part of the reason (along with Windows) that no matter how fast they go, they *will* lock up here and there. Being soley little endian is a pain too (stupid byte ordering, albiet common). With more gprs and a big endian mode (even bi-endian) emulation could be sped up 2x, *easily*. It's also allow for direct memory reading/writing to the emulated hardware if the byte ordering is the same, which in turn means a lot of emulated software will be competitive to native speeds (same byte ordering means you can mix arches,.... 6502 instructions responding to x86 native libraries for example).
Just my 2 cents, but based on technical details rather than simple nostalgia or "feel".
