I liked Martin Mystere and am playing Dead Reefs at the moment.
I think Tunguska is a fine game, but I am also one of those
who disliked Druuna (still have it somewhere),
if I do or do not finish a game is not a reason for me to
consider it a good or bad one. Mostly it's me not
being patient enough. But I do have a dislike for games
with a lot of reading or conversation in it.
I also liked Barrow Hill a lot, although I agree more
could have been done with the mysterious surroundings and the petrol station was to dominant a location.