what are your shopping habbits, and do they change depending on your mood?

some of mine are:

- I'll always by the most eexpensive item on the shelf, even if both items are exactly the same and do exactly the same thing (I do this in any mood)

- I'll only buy even numbers of stuff (2, 4, 6, 8), and the same with boxes of things- if a box has an odd number of items, it does not sit well with me

I tend to avoid any famous brands- just buying what I find, and what the first thing I see is (say if I buy toothpaste, I'll buy the first tube I see, not look for a brand name)

- I won't buy anything if it's on "special offer", I never knew why I think this, but I always thought it took away some of the products quality
- if mannic I'll hoard multiples of the same item and not care (1000 cans of cat food for example, and I don't have a cat)

what are your shopping habbits if you have any