Not just how it physically looks but, y'know, the vibes.
Athlon XP for me, easy.
the program counter is addressable like a regular register (very trans feature, can't explain why), every instruction is predicated through an incredibly elegant mechanism, and it really packs a lot of punch in a relatively small number of transistors.
The top 6 bits of PC are also physically implemented as CPU flags... the Bi Flag, the Lesbian Flag, the Aro Flag, the Ace Flag, the Trans Flag, and Enby Flag.
👍