I haven't upgraded anything for a while, and I dont know if i should or need to. I enjoy playing the odd game, CS: Source, Tactical Ops, Far Cry etc...I do a bit of photoshopping, and to be honest my computer seems perfectly fine for all that.
But I just want to upgrade!
I currently have:
AMD Opteron CABNE clocked at 2.5ghz
ABIT AN8 Ultra
Inno3D 7800GT 256
OCZ 1GB Dual Channel 2.5-3-3-7
X-Fi Xtreme Music
200GB SATA WD
200Gb SATA Maxtor
19" Viewsonic VX912
Logitech G5
Microsoft Multimedia Pro Keyboard
Creative Megaworks 250D Speakers
Lian li PC60 S
The only thing I can think of is 2GB of RAM.