OK, let me try to remember, since 2002, because before that I used my family PC (since the 486 days until the P3).
Pentium 4 2GHz(Northwood), Athlon XP 2600+(TbredB), Athlon XP 1700+(TbredB), Athlon 64 3000+(Winchester), Sempron 2600+(Palermo), Sempron 3000+(Manila), X2 4000+(Brisbane), E5200, E5400, X3210, i3 2100
I have and had other CPUs, but that's from my main PC.
the current i3 and the 1700+ are probably the ones that lasted longer...