I loved mine as well, and not just for Tunnels of Doom. It did turn into quite the monstrosity by the time the expansion chassis (with the disk drives, assembler card, extra RAM cards, etc.) was hooked up -- it was almost like having a real computer, what with all of the cabinets and wires and whatnot. (Even line-number TI Extended Basic became really useful with the disks, since you could dynamically load subroutines.)

I finally sent mine, along with the expansion box, to the recycler a couple of years ago. Hadn't used it in over a decade.

I recently bought my third TI-85 on Craigslist, I also still have my Cannon A-1.

I still have my Timex/Sinclair 1000, Atari 800 and Canon AE1 Program. :)

And unlike the other pieces of tech, the Canon AE1 Program can take better pictures and has a better interface than most cameras today.