I know we all try a lot of different products, but what have you actually used up and re-purchased over and over:
For me:
Clinique Mild facial liquid soap and mild clarifying lotion
Aveeno Ultra-calming night cream
Olay Regenerist serum (but I recently purchased Aveeno Positively ageless and like it even better)

Things I won't be re-purchasing:
Clinique Even Better skin-tone Perfector (After 2 bottles, I think it feels good but it doesn't seem to have any long term effects)