Question 5: Which RPG cover best captures the spirit of the game?
Quick answer, all the good ones! The good RPG supplements have good art, it kinda goes with getting it right.
Longer answer, I have a couple in mind
SLA industries, the artwork for this game was and is one of its central strengths, no surprise given the artists involved in its conception, but the grit and the rain on the front cover of the 1st edition to me sums up the spirit of the game, even better than the cover with Halloween Jack, as used on newer editions of the game.
Another game where the art and the game are intertwined. There is no doubt this is a fantasy game, but grittier, and gorier, and in some ways more real than the F20 games that came from the other side of the Atlantic at the time. Again, chaos, tattoos and goblin blood front and center.
The truth is, it's hard for me as a non-design guy to distinguish between art that does the job, and art that I love, or have fallen in love with through time and association.