The saying goes "Theres more than one way to do it", not "Theres more than one way you need to accomodate it". ;-)

TIMTOWDI (as I understood it) refers to the core language, not general API design. I would reconsider your approach - you probably do not want or need the hassle of excessive error checking on parameters, a combinatorial explosion of edge cases to test for, laborious contradictory POD, maintaining obscure language features etc etc.

If people dont like your API, well they can wrap it in "The Way They Want to Do It". And do their own damn testing.

Make it useful and easy to grok. Keep it Simple, Stupid.