I am most thankful for the years spent with my old TG-CD rig, communicating on the Turbo List, occasionally borrowing and lending things. I got to try a homemade arcade joystick for the Turbo, mounted in a plastic briefcase, long before it was at all commonplace to have arcade parts for home joysticks. I got to play all sorts of games I didn't own, like Flash Hiders, thanks to fellow listers.
I am also thankful of the opportunity to hunt all over Japan (well, Tokyo, Kyoto, Hiroshima, and Morioka, anyway) for a new copy of Drac X just as stores were starting to take PC Engine stuff off the shelves in their video game sections.