These begin when I was about 8 or 10, I had some old Packard Bells prior to that, but was too young to know anything about them. One ran Windows 3.11, the other ran Windows 95. Past that, I had these:
PC1: Dell Dimension 4400
CPU: Pentium 4 1.6gHz
Memory: 256MB
Disk Drive: CD-ROM
Hard Drive: 40GB
Floppy: 3.5" Floppy
GPU: Geforce 4 TI4200se (upgraded years later)
PC2: Custom Build (Replaced PC1)
CPU: AMD Athlon 64 3400+
Memory: 1GB
Disk Drive: CD-RW/DVD-ROM
Hard Drive: 120GB
Floppy: 3.5" Floppy
GPU: Geforce FX 5900 Ultra (vanilla 5900 w/ Ultra BIOS)
PC3: Dell Inspiron E1405 (owned alongside PC2)
CPU: Core Duo T2300 1.66gHz
Memory: 1GB
Disk Drive: DVD-RW
Hard Drive: 100GB
Floppy: LOL.
GPU: Onboard Intel whatchama-thingy
PC4: Custom Build (Replaced PC2)
CPU: AMD Athlon 64 X2 4200+
Memory: 2GB
Disk Drive: DVD-RW
Hard Drive: 250GB
Floppy: LOL.
GPU: Geforce 7900GS (which I OC'd, fried to the point of artifacts, and replaced)
PC5: Custom build (Replaced PC4)
CPU: Intel Core i5-750 2.66gHz
Memory: 16GB
Disk Drive: Blu-ray Burner
Hard Drive: 1TB
Floppy: What in the world is that???
GPU: Geforce GTX 460 1GB
PC6: Google Nexus One (Replaced PC3)
OS: Android 2.3.3 (CyanogenMod7 RC2)
CPU: Quallcomm 8250 Snapdragon 1gHz
Memory: 512MB
Storage Drive: 512MB ROM/16GB MicroSD
Floppy: My charger is floppy? That counts?
GPU: Adreno 200
I guess this is as good a time to show off my current baby I built last year. Sadly, I'm addicted to speed and GPU performance since I game alot. I'll probably rebuild when Bulldozer comes out, and a pair of GTX 570's for SLI will be a tad bit cheaper.