I'm a Coach fanatic as well...have 6 or 7 bags, a wallet, wristlet, cross-body bag, sunglasses, makeup bag...
I don't know why, but I just love their stuff. I am dying for a leather bag, but I really can't justify spending $400 (or more) right now with my wedding less than 3 months away. I am so tempted every time I get one of those 25% off emails though.
I usually buy a new bag every summer, but I use it throughout the year. I try to aim for a versatile style and color so that I don't have to worry about changing it with the seasons or with what I am wearing. I had a lovely mauve one that I used last year and I got tons of compliments on it. It was my favorite one. Unfortunately, after a year's use, it was dirty and there is just no good way to clean it.
Unless, some of you know a good way to clean it!