My favorite addition?
  Well, I was bothered by how hard it is to get my Quick Hitch hooked up after I took off my backhoe and connected the 3pt arms.  To solve this problem I bought another Quick Hitch.  Now, after I've hooked up the new quick hitch, I can just back up to the  quick hitch  and wha-la, I'm connected!  Very Cool.
Cliff
Actually, I've mostly  only used the backhoe.  I worried the decision to pay the money for a BH all over the place and now, it's the lonly thing I've really used.