Which CPUs do you love or hate

[Zac67]

Love:
all 68k - an assembler freak's wet dream
6502 - an assembler freak's nightmare, but the heart of Apple ][ & C64
Athlon 64 - starting off several evolutionary steps simultaneously
G4 - really kicks ass in Altivec
K6-2 - great upgrade for Pentium boards (thanks AmigaPixel!)

Hate:
Pentium 4 - worst performance per Watt ever, complete nonsense
8086, 286 - coder's bad dream, dumbest memory model ever

[Zac67]

What most tend to forget is the fact that a single core would always be faster than a dual core running half its speed (or quad respectively) - 1x 6 GHz > 2x 3 GHz.
There is no 6 GHz? Yes, that's the point. The industry has changed over to multicores as the only way to considerably raise performance since there's no way to increase clock speeds any more. There are gentle increases as well as gradual architecture improvements, but nothing to show off to any potential customer.