I am anal. I know that. I like being organized and coordinated. Yesterday at work I got teased for typing up labels for my files and color coding my files (yellow for current year, red for last year, and green for misc. stuff - it looks like a stop light).
One of my co-workers showed us a spreadsheet complete with graphs her husband had created to illustrate their daughter's over usage of the cell phone. I wasn't properly impressed because I would do the same thing. Excel is my friend. You should see my budget spreadsheets (yes, plural). They are quite impressive.
Of course, filing isn't a hobby of mine - there are many things I'd rather do (play Lego Star Wars II, write, etc), but as boring as filing is, the end result makes me happy so it is worth it, I guess.
But, I really don't want to think about how many hours I've spent creating and utilizing filing systems.