I used to think that I was completely a "big picture" thinker, but lately I've noticed that I get very bogged down in the details. When I'm thinking about history or politics or psychology, say, I'm really into general trends, with details just for support. But when it comes to thinking about something concrete, like putting out iced donuts by 6am for work, I get caught up in the details (are they in the correct, alternating order?) sometimes to the point of overlooking the main point - just get iced donuts out there for customers!
Also, if I start thinking about something in my general, big picture way, and a detail catches my mind, that one detail can become all-consuming until I realize what I'm doing and jump back to the big picture.
One thing I find most fascinating is how things relate to one-another, and how that relationship relates to other things - I've always thought of this as big picture thinking.
I'm also known for "nitpicking", and you'd better get your details right, darn it.
BTW, I'm INTP, so I "should" think big picture.
I didn't answer the poll; there was no "I think big picture, but details derail me".