The first computer game I ever played (TT back then), and still my all time favorite
When I don't want to play ANY of my games OTTD is always fun. Always something to work on (especially for someone with a little OCD like me), always something new to make, etc. IMO one of the best games ever designed.
And with OpenTTD you also have nearly unlimited options of "NewGRFs", that can modd the game, or just add new vehicles, etc.
I still have my old savegames from the mid-late 1990s... somewhere
. I usually have so massive savegames with OTTD, that even my computer (a high end gaming system) gets to it's edges