OK, something of a counterpoint.
While I LOVE purdy books with fabulous art and cartography, I'm not looking for a coffee-table book. I'm looking for a game book that looks good, but will handle everyday use at the table, around food and drink.
So, while old-style black and white artwork from yesteryear really doesn't cut it by todays standard, heading too far in the other direction (just to keep up with the joneses) is also something that doesn't go over well, especially if it significantly delays a "finished" product.
SDLeary