I have several but if I had to pick one it would be my home built 3pt 55 gallon sprayer. I built it to help me get away from the weed eater, understand I have almost two miles of fence and need all the help I can get.
I must say I enjoy all of them but my favorite is planting, so my favorite is my planter. I would have to say my least favorite is my tiller. It is just to slow.
I would also have to say FEL. Any tool that will save my back at the time.
Don't have a backhoe at this time, but I could see how this could become a favorite.
My BoDozer Grapple . . . I've cleaned up up acres of downed hedge tree debris with the grapple - would have taken untold hours by hand. Love the grapple.