What's your favorite/best rose food?

Barnyard manure. (I know, not what you were looking for.)

Same here. Worm compost is 2nd favorite.

I like Bill's Perfect Fertilizer, which is derived, in part, from hydrolyzed fish, organic calcium, sugar cane, humus, and seaweed, among other ingredients. It's faintly sweet smelling, and has a higher N-P-K ratio of 6-11-5 compared to other fertilizers with organic content.

Chicken manure and my own worm compost. I also throw in a bit of bone meal and blood meal.

Espoma Plant Food.

Mills Magic Mix 6-5-1. Have used it for years. Interspersed with Mills Easy Feed accelerated flowering formula 20-10-6. Occasionally add some Fish Emulsion. Roses appear happy