Erik asked what game was our intro to roleplaying. For me, it was this one in 1983:
But then when I started playing with a group, they were using AD&D mixed with Holmes, so I backslid to this one:
Later, I delved into 1e AD&D and OD&D and then left the hobby for about twenty years.
When I came back to the hobby I settled on this version for the basic game:
Although I also own this one just for shits and grins: