Unfortunately, CT only allows 6 characters. Otherwise I'd have gone for AEPHI 95, or possibly GRYFNDOR
I'm thinking of going for one of the "Caring for Pets" plates. They have a picture of a dog and a cat. They're standard 3-number, 3-letter plates, but the 3 letters are always DOG, CAT, or PET. Part of the proceeds goes toward animal population control (meaning spay/neuter, not euthanization).
But for now, plain ol' tags for me.