Most of my stuff... I'm vice president/hardware specialist for a small independent computer consulting firm based in central Indiana. I apologize for the crappy camera quality, but you should be able to size it up. Let's see if I can list all of this off from memory...
Main corner, you can see my main rig and troubleshooting station. Cables/mice/keyboards/monitors storage is all the bottom two shelves.
Here's the other wall, printers/expansion cards/HDDs/optical drives/motherboards. Bottom two shelves are the morgue, computers I haven't found time to do autopsies or salvage yet. Also one of my old 20" CRTs, I have two more under the (functional) pinball machine in the next room over.
Close up of the other morgue. Only three laptops ATM because I passed off another six to a coworker about a month ago. You can also see my four extra batteries for my UPS, disconnected because I need to crimp new cables (old ones were too thin and started to melt)
Close-up of the troubleshooting station. Spare GPU, spare projector, MTG cards, portable toolkit.
Here you can see cleaning supplies, games collection, spare CPUs, thermal paste, HP Touchpad with wireless inductive charging dock, Dell XPS15 (1st gen i5 but a
gorgeous screen, 80GB Intel SSD upgrade), networking gear, receiver (powering an Acoustic Research HC6 5.1 system)
Assorted boxes, spare PSUs, 2-bay HDD dock, 4-bay HDD dock (hidden on the other side of the tower), hidden PSU/center speaker (PSU looks super bland idling that low without the four 12AH SLA batts hooked up to it)
Close up of my main rig - 27" monitor, DT770 Pro 80ohm, Logitech Mic, Logitech KB800, Logitech Performance MX, below is the 8" 100W long-throw woofer (turned way up) and Dell Poweredge server (not hooked up at the moment, loud as hell)
Not shown - iPod Video 5G, Z-Line ZL5001 chair, Pinball machine/minifridge (other room), TV/NES/SNES/N64/Wii, lots of other stuff I'm forgetting
Getting soon - FiiO E17, AntLion ModMic
Computer specs - 4Ghz AMD 965 BE quad core cooled by Zalman CNPS 9900A 120mm CPU cooler, 6Gb DDR2 RAM, EVGA GTX550Ti (upgrading to GTX6xx series on release) 120GB SATAIII SSD and 3x3TB internal RAID0 array (switching to 4x3TB RAID5 when HDD prices rebound from Thailand flooding) running on Highpoint RocketRaid 2720SGL SAS controller, additional eSATA card running the 6 drive ~5TB JBOD in the 4-bay+2-bay docks, Antec 900 case with NZXT fan controller, Zalman ZM-850 modular 850W PSU, Creative X-Fi Fatal1ty Professional PCI-E sound card, Intel PCI-E NIC, Asus M4N82 motherboard, modded 800W 1350VA CyberPower UPS.
Think that's all of it, hopefully I put in enough detail to answer most of your questions
Feel free to ask for more details/advice if you want.