As a slightly more amateur gamer...
1/ Last Express (duh
)
2/ Syberia
3/ Broken Sword - Shadow of the Templars
4/ Broken Sword - Smoking Mirror
5/ Fahrenheit (the beginning!!!)
6/ The Longest Journey
7/ Myst
I think that is all I have played - I've got the Black Mirror, Amerzone, Barrow Hill, Darkfall and Scratches on order!