Honestly I can categorize myself as fiesty but not manipulative.
You can be fiesty and not manipulative but once you get into the manipulative I believe that really isn't submitting. There is a difference between playful and obstinant. A fiesty sub, to me, is playful, a manipulative sub is much more on the lines of obstinant (trying to hold out, top the Dom and manipulate the situation, refusing to give in or give... or submit) and to me that just isn't being submissive. And I agree with the previous reply, if you are not in the right mindset or it isn't coming naturally maybe it isn't the thing for you. However, being fiesty and playful, not giving in right away maybe but eventually giving in might work for the right partner and does not mean you aren't submissive and could be fun as long as you aren't promising to submit and then not. For instance, alot of subs have rape fantasies and they don't submit at first but they do eventually submit. And, it is the submitting that is important for a submissive so that is usually their main goal even if the scene doesn't begin that way.