I would say both?! I have tons and tons of notes and thoughts around... but I only write in the form of chapters. I don't write random chunks here and there - is that what you mean by holist? - but do write lots of drafts. Then finish and move to the next chapter.
Um, re-write: If I ever finish this chapter I will move on to the next one!
I have to have each chapter planned out in detail, then i write a first draft, then a second before then changing it all again!! I don't tend to write random stuff either but work on each chapter, so not sure which one i am!!!
Hmm, I would settle for being a writer of any sort right now, given that I am putting off writing anything by cruising around this site Hypothetically, I'm probably the one who needs to write lots to know what I'm on about - I've heard it described as 'iterative versus planner' but I guess it's much the same thing. Good luck with whatever writing you're all engaged in and I'm off to find a virtual egg timer...