For me a sub without some struggle is not very interresting. I need something to "work against" if you know what I mean.
feedback is nessecary to improve whatever it is you are doing and this area is no different.
Realistically submissive sounds understandeable and should work for most, except those that crave to be completely submissive to their Dom/Mistress.

Stubbornness and arrogance would abviously lead to spankings though Hime