Any blades you won't buy again?

I bought a load of different sample packs to try after ditching the Derby Professionals I got for free with my first shavette. Among them was Feather which I like and have used more of than any other. Yesterday morning I put a Gillette Platinum in but decided I didn't have enough time to do the job before leaving for work. I took it up again later that evening and forgot what blade was in there and was trying to figure why it was a bloody struggle. I've got limited experience I'll admit but the difference was immediately obvious. They won't be in my shave box again.