What are the criteria for a good skin product?

For me, the skincare products I'd 100% repurchase are the ones I "wouldn't mind using up." When I'm almost done with a bottle, I get anxious and start ordering more. The most important thing is that they're non-irritating, breakout-free, and reliable, even throughout the seasons. While they don't necessarily deliver dramatic results, they keep my skin feeling healthy, which is why I keep reaching for them. When I try a few different products and eventually return to them, I know that they've become my go-to product.