Family PC before I got my own
Intel Pentium 166 (local computer shop)
AMD K6-2 333 (HP)
My own pre-built
Cyrix MII 300, 225MHz actual (Packard Bell)
Intel Celeron 433 (Dell)
Intel Pentium 3 550 (Gateway)
all built myself since
AMD Duron 750
AMD Duron 1100
AMD Athlon XP 1600+ 1.4 GHz (died...