I'm a pocket scrapper and I mostly scrap chronologically. Yesterday, for example, I could have scrapped either weeks 26 (insert), week 27, 28 or 29 when I was sitting down to work with a new CT kit. I ended up doing week 28 because it best matched the kit colors. I have a post on my blog with a little more about my
workflow.
So while I am usually scrapping within 3-4 weeks of the current week, I'm not necessarily chronological. This week my goal is to get the bulk of the vacation layouts from last vacation done... since we leave on another trip on Friday.
I also have a folder full of photos I love that I can use to do new pocket layouts that aren't chronological and probably will never be printed, but I love the pictures and find that just doing pocket layouts with fun photos inspires my creativity sometimes. Those would be in the not chronological, I'm just having fun with pockets category.