I wud consider it a blessing of Allah if he can give me a spouse who guides me when I am not right, even if I dislike it; and forgives me when I do something wrong and makes herself, as well as me and my future offspring, walk on the path of Jannah and that of Allah's blessings.
Frankly, I don't care whether she is picky or carefree as long as she supports me at the end of the day. I am not marrying anyone to change their personality.
Im into challenges. Love to renew and evolve myself, so Id go for the positively picky spouse.
The carefree is not my cup of tea. I regard them as being too cold or should I say cunning? They will avoid conflicts at any price.
Then call me the cunning one. For me, it is not about being carefree or cunning or trying to avoid conflict. It is about respecting other person's individuality. (most of the time) The environment we are brought up in tends to mold our thinking of what is right and what is wrong. Pushing to change such deeply rooted philosophies can easily wreck havoc on one's personality.
However, if both persons are willing to change for each other, good for them. It shouldn't be single sided and in an environment where one person is imposing.