I've noticed that few fanfics ever depict Ranma choosing Shampoo just
because he prefers her over his other fiancees.  Why is Shampoo considered
such an unlikely choice?  Certainly, she has a few odd ideas and Cologne is
the mother-in-law from Hell.  Nonetheless, Shampoo is attractive, dynamic,
brave, persistent (aren't they all), and an excellent cook.  Although she
initially regards Ranma as a trophy husband, she does seem to develop a
genuine fondness for him as the series progresses (I'm thinking of
"Desperately Seeking Shampoo").  I'm not saying that Shampoo is the best
fiancee for Ranma, just that I think she shouldn't always be considered the
least likely of the three women to end up with Ranma. 

I, too, noticed this destressing lack of Shampoo-gets-ranma fanfiction,
and have set out to remedy it! I'm currently got my first Ranma fanfic,
"Purple-haired Destiny" in the final editing stages, so watch for it soon!

Ryan