I get very attached to gear rather easily. I love things that look epic, and replacing my epics with quest greens while leveling to 85 was a sad experience. I saved most of my level 80 gear, and sometimes run old stuff to get tier tokens and weapons so I can put them on and AFK in Stormwind and feel cool. (Even though I'm not.)
Generally, my soft spot is staffs. Any staff that just has a really awesome model I want to keep. My druid still has Origin of Nightmares from Naxx 25.
She also owns:
Twisted Visage (Ulduar 25)
Grand Marshal's Glaive (honor points)Lupine Longstaff (ToC) and Shaft of Glacial Ice (ICC).
My shaman is carrying around Staff of the Plague Beast from Naxx 10.
I also like weapons that match, such as Aegis of Damnation and Hammer of the Astral Plane. I find both of these to be incredibly ugly, but they match! And that is cool.
P.S. Yes, my druid is wearing gear to match the level of the weapon she's modeling in each picture. I'm that much of a nerd. And I kept/farmed up that much gear. Yes, her bags are pretty much full of random junk.