I'm half and half.
I like routines for things like planning my day, and for doing things that I have to do but don't like to do. I like to know what I'm doing, to be in control because of it, and to know how long I have to do it for.
I really hate indefinite misery, uncertainty about when it will end.
This is a big part of what makes singledom so lousy for me - if I knew my singledom would end at some point, I could just count down the days, weeks, months, or even the years, and keep myself busy in the meantime. But there's no certain endpoint, and that bothers me.
On the other hand, I like - I don't know if you could call in "spontaneity", but rather "keeping things open-ended". I like having options. I don't like feeling like I'm locked in to something and if it turns out I don't like it, or if it's not a fit for me, then I'm stuck.