Let's see, I have (listed in order of roughly how much I use them):
Mac Pro 5,1 (2010), 2x Xeon 3.33GHz X5680, 16GB RAM, 512GB SSD, 2TB HDD, Radeon 7970 3GB
This is my day-to-day "modern" desktop computer
15" Macbook Pro (Mid-2014), i7 4770HQ 2.2GHz, 16GB RAM, 256GB SSD, Iris Pro 5200
This is my day-to-day laptop, though I rarely actually "need" a laptop these days
i7 2600K 3.4GHz, 24GB RAM, 256GB SSD, 2TB HDD, 6TB HDD, Radeon 5770, Gentoo Linux
This is my fileserver/HTPC
486DX2-66, 16MB RAM, 540MB HDD, S3 Trio32 VLB, SB16, GUS, DOS 6.22/Win3.1, AT case
This is my primary retro PC
Toshiba 430CDT, 48MB RAM, 2GB HDD, CT65550 2MB, ESS688 and YMF262, Win95
This is my primary retro laptop mainly used when "I want to write DOS code whilst sitting back in a recliner/beanbag/etc"
Pentium 233MHz MMX @ 2.5x 100MHz FSB (SS7 Motherboard), 64MB RAM, 8GB HDD, Matrox Mystique 220 4MB, Diamond 3dfx Voodoo2 12MB, Philips YMF719E-S, Win95, AT case
AMD Duron 800MHz, 256MB RAM, 40GB HDD, Diamond Stealth III S540 (S3 Savage4 Pro) 32MB AGP, Sound Blaster Live 5.1 SB0060, Win98
Thinkpad R52, Pentium M @ 1.86GHz, 1GB RAM, 80GB HDD, Mobility Radeon X300 128MB, WinXP
This was my old college laptop (which I got in my 3rd (?) year of college)
Thinkpad T500, Core2Duo P8600 @ 2.4GHz, 4GB RAM, 300GB HDD, Mobility Radeon HD 3650 256MB / Intel GMA 4500MHD, Win7 / Arch Linux
Bought brand new in 2009, and then barely used it. It still mostly has a "brand-new-in-box" smell to it.
Amiga A500, PAL, extra 512KB trap-door expansion RAM, ACA500plus (mainly for CF card support), extra external floppy drive, custom-built new PSU by Ray Carlsen
I intend to use this more often once I get an Indivision ECS which I pre-ordered just yesterday! Right now it's a pain to lug out my 14" PVM each time I want to use it.