I was thinking about this question today, and my number one reason for tracking is that I think I have a great memory, but the data says differently .
Memory is fallible. Basically, like shedev said, what I think I wore, isn't what I really wore. It's like tracking what you eat or when you go to the gym, the act of paying attention makes me more mindful, and accurate. Yes, I know what my workhorses are, and I know when I haven't worn something in a while, but results wouldn't be 'surprising' for so many posters if we all had infallible memory. For example I'll remember trying something on, but that doesn't mean I wore the outfit that day.
Sterling summarized a lot of my reasons, but in general for me:
-it guides future purchases both in terms of the amount to spend per category and in identifying needs for my real life
-it provides hard data that makes it easier to cull items that aren't getting worn and I don't love
-I track outfit happiness so I log outfits (it helps to know what to repeat), and it's just as easy to track wears while I'm at it.
-wardrobe management helps me enjoy the clothes I have without buying more. For me it doesn't suck joy, it's a daily 2 minute thing when I go online to check email. Setting up my spreadsheet took a few hours, but after that, it's fast.
-it lets me know the true seasonal windows for wear and spurs me to wear items I love during those windows. In general it helps me to wear 'special' items more.
-it's helped me develop my style by guiding it closer to my real life needs and my yearly preferences (based on wear patterns I can see when I'm not into skirts as much but loving jeans, as another poster mentioned.)
-like Suz says it shows me that I get the most wear out of an item while it's new, so I should go with that, and wear (and repeat) new items a lot.
-it guides me towards the wardrobe size I should aim for. This is a little tricky as my wear patterns change a bit year to year, but I know in general which areas to edit, and which could use more variety. I'm not exactly one in, one (or more) out yet, but that's a goal.
-it gives me data about how long certain items are going to last before wearing out.
-cobalt said: I started tracking wears b/c I feared I was churning my wardrobe more than I'd like, donating items after very little wear simply to make room for something shiny & new. This, it helps me be more mindful. Having a limit on the number of items I could purchase per year/season would do this too -- I need to think about that.
I can definitely see why tracking might not be something I was interested in if I had a small wardrobe, and I felt completely comfortable with editing it without needing to justify to myself each decision. Also if I didn't enjoy shopping and purchased relatively few items per year.
I'm an emotional shopper too, and very intuitive. My work is very intuitive/creative. But I do have an analytical side and do the taxes, investing, and budgeting/shopping for our household. I don't bake and my cooking is mostly salads