I'm trying to downgrade a lot of my shop but one thing I've found that I don't want to buy the cheap versions of is washing powder/liquid. I've tried cheaper brands/own brand stuff but I just love the smell that the more expensive ones leave on my laundry. I've actually started using the liquitabs and I think they're even more expensive than the powder tablets I used to use.
Another thing is mince. I bought cheaper mince (not smartprice but regular beef mince, I always usually buy steak mince) and the lasagne I made with it was very greasy.
What won't you compromise on in tough economic times?