In R/L, any of the first three are good.
When I read, any but MC (I skip the MC offerings in the Library).
When I write, I agree with dav4jon, woodsman'sgame and -angelstar-. Most of my stories begin consentually and then "degenerate" into nonconsentual as the woman finds herself in over her head. I wish there was a code for that (sort of the reverse of reluctant).