Yeah, Terrestrial Seafaring Hero style is not exactly the cream of the crop, and since it's only a Terrestrial style, it is, more or less, not worth having.  Besides, there are plenty of Terrestrial styles to be had - my personal favorites are Five Dragon, Golden Janissary, and Even Blade styles.<br/><br/>As for Celestial styles, it is, as you've said, largely open to interpretation.  Since the Chain Daiklaive can act as both a dire chain and a short daiklaive, if I were running the game, I would allow it to be used with styles compatible with one facet of the weapon, but not the other.  Said another way, I would allow people with Chain Daiklaives to take styles that used short daiklaives as form weapons, but not dire chains; or vice versa.<br/><br/>Hope that's not too confusing...