Vash a perfect 10.
I'm constantly admiring writer Ira Steven Behr who created Vash for the series. The character is an explorer with an expertise in archaeology, an adventurer, a female Indiana Jones. In the episodes where she appears, this beautiful brunette, with her beguiling smile and blue eyes, manages to charm not only the good captain of the Enterprise but the omnipotent Q as well.
I've always seen the Picard/Vash relationship as an homage to the great romantic film pairings of the 40's. Vash is Bacall to Picard's Bogart. The very compelling 'battle of wills' dynamic to the Picard/Vash relationship is reminiscent of Bogart and Bacall in the classic movie "To Have and Have Not." Vash's brazenness complements Picard's more sedate personality perfectly. She is the ideal foil for Picard's straight man. The characterizations and relationship dynamics between Picard and Vash makes this pairing a pure joy to watch.
Around the fourth season, Michael Piller, the show's associate executive producer, inquired about marrying Picard to Vash to provide some new story dynamics for Picard. The studio executives killed the idea of marrying off the captain. The shipboard marriage idea survived in the fourth season episode "Data's Day" where Miles O'Brien married Keiko Ishikawa. I always wondered how that P/V marriage might have looked if it had come to pass with my P/V fanfic simply being my own speculation. Would they have shown more of Vash's academic side? Would they have put her on dig sites or in lecture halls? (DS9's episode "Qless" refers to the Daystrom Institute wanting her to speak on her travels.) Would they have shown more of Picard's interest in archaeology? Or would Vash have become a reoccurring bit player, the officer's wife/civilian scientist role that Keiko played?
In my opinion, Vash is one of those underutilized characters with a virtual goldmine of untapped potential. Granted, I'm sure my P/V fanfic stories center more on Vash and her relationship with Picard than the series realistically would have if it had gone the P/V marriage direction but that is the glory of writing fanfic.
Warmest Wishes,
Whoa Nellie