Well, I don't know you, but there are some things that I have especially enjoyed about staying at SSR.
The pool is warm, the hot tubs are hot and there are TWO slides at the main pool. The big one, which is very fun, and the little one which is a different kind of fun, depending on your kids. My 4 year old went down the big slide about 3 times last month and he went down the little slide about a bazillion times.

The drinks at the bar are very nice as well - have a Pina CoLAVA - you will be glad you did!
We also really enjoyed the proximity to DTD. Breakfast at Wolfgang Puck Express is really good, and it's nice to be able to enjoy a stroll over there, too.
The beds are very comfortable at SSR and it really is generally quite a quiet, relaxing place to retreat to after the parks, though admitedly I have never stayed at Congress Park.
The SSR Lovers and Owners thread has slipped off the board, but there are lots of people who enjoy SSR. Here's the link anyhow.
http://www.disboards.com/showthread.php?t=1329308
Oh, and here's my old trip report from January:
http://www.disboards.com/showthread.php?t=1324429
Which, in case you don't want to sift through all of it, I found contains another list of things that I enjoy about SSR

:
1. The bus stops are cleverly designed to accomodate TWO bus pick ups at the same time. I don't know that this is unique to SSR, but it was not the case at POFQ or OKW. I will have take a picture to illustrate this.
2. The landscaping, being a series of formal gardens invites a contemplative stroll or a relaxing repose on a well placed bench....not that I have seen a whole lot of people doing this, but it's what I want to do!
3. The wildlife is just everywhere - and again, maybe this is true elsewhere, but in addition to the little lizards I saw at POFQ last year, I have seen more plump little toads than I would believe! At least one or two on pretty much every venture out of the room in the evening. We have also seen rabbits, swans and - forgive my lack of ornithological accuracy, one of those big white water birds - a heron or an egret, not sure which, just walking along near the sidewalk.
4. Even from the Carousel, walking from DTD's West Side only takes a half an hour at a relaxed pace, and it's a very nice walk along the Paddock water feature.