Canon A1, my favorite camera of all time. It still works and I still use it from time to time. The commemorative lens cap makes it easy to remember the year. My favorite F mount lens is the Tokina AT-X 90 mm Macro (Bokina) not shown here.
I love my Mamiya RB67, my Pentax Auto110...and many more. But for me, one of the Nikon F5 bodies I have is my favourite. I took my son for his graduation to Tokyo. I found a mint Nikon F5 and 35/2 D. I grabbed a ten pack of Delta 3200 and Fuji Industrial 400 and enjoyed shooting street with the beast. Great memories.