I think the idea is perfectly acceptable as long as two requirements are met:
- The extrapolations are reasonable, and[/*]
- You write them in such a way that they don't impose your story on others, including the developers'.[/*]
[/list:u]
What you've described sounds fine to me on the first point. The second point is trickier and gets to the type of assertions one might make. For instance, if you claim that the Sea Witches are just one group of mystics in some parts of Roegadyn society, and that they don't exert any inordinate power (i.e., your character fear them because of a personal grudge, not because they're a world-spanning conspiracy holding the ear of most leaders, or because he had a run-in with them and they're the most revered group of female spellcasters so all Roegadyn are against him), you don't really "take control" of any part of the lore, nor do you step on canon at all. This route ensures that of others want to claim they're, say, a field agent for a different group of female Roegadyn spellcasters, your extrapolation doesn't affect their claim, and you can both have your backstory and RP together. If SE comes out with some new canon that steps on your backstory, you can make changes and say that your backstory is an exception to the newly described setting.
Basically, point two is a matter of respect for other roleplayers and their stories. By restricting your effects on the world as much as possible, you ensure that you don't box other players into the position of either accepting your extrapolations from canon or calling your character crazy. You also have an out if the canon changes out from under you. Ways to stay in line with point two are not to make any sweeping statements about the world, to limit your extrapolations to a single village or other small area specific to your character, and to always use existential quantifiers ("some female Roegadyn casters are Sea Witches," as opposed to "all Roegadyn casters are Sea Witches").
The Freelance Wizard
Quality RP at low, low prices!
((about me | about L'yhta Mahre | L'yhta's desk | about Mysterium, the Ivory Tower: a heavy RP society of mages))
Quality RP at low, low prices!
((about me | about L'yhta Mahre | L'yhta's desk | about Mysterium, the Ivory Tower: a heavy RP society of mages))
