I like flexibility within structure :)
I best work under a situation where there's a nice skeleton and structure, but still has flexibility for me to work with.
Taking for example a script, I work best when the theme, character profiles and the general flow of the script is given (e.g. talking about this, then talking abt that), and everything else is left to me to write. haha.
If too much structure is given, I feel very restrained.
If too much freedom is given, I feel slightly lost and will attempt to set the structure myself.
How troublesome :)