The only cards that are worth something to me are the ones with personal messages in them. If it's just your signature, it's going in the trash tomorrow.
I buy the bulk pack of general purpose gift cards. Some have got flowers on the front. Others say Happy Birthday in gender neutral styling. They're all blank on the inside. I write messages to people. The pack of 20 cards costs about the same as two of those shitty pre-written gift cards.