Janet - aft balcony state rooms are very much in demand. You get a larger balcony than you would normally get. Its really neat to sit out there and watch the wake from the ship and too see where you have been.
Not sure if mini-suites qualify for the suite "perks" ask your TA.
To my recollection there are no perks with a mini suite. The mini suites on emerald deck are different than the minis on dolphin, which is one deck above. My preference is emerald because the balconies are covered. Dolphin mini suite balconys are completely open! Just something for you to think about if you get "upgraded" to a dolphin deck mini.
You may love an open balcony, many people do.
Rccl SOS 10/99 - Celebrity Horizon 11/01 - Golden Princess 11/02 - HAL Zuiderdam 11/03 - Celebrity Summit 4/04 - Star Princess 11/04 - NCL Spirit 3/05 - HAL Zuiderdam 6/05 - Star Princess 11/05 - HAL Westerdam 1/06 - HAL Veendam 4/06 - Sun Princess 10/06 - Caribbean Princess 11/06 - Star Princess 4/07 - Caribbean Princess 7/07 - Coral Princess 11/07 - Ruby Princess 12/08 - Crown Princess 4/09 - Emerald Princess 11/09 - Crown Princess 11/10 - Grand Princess 11/11