I grew up in South Florida, so I logged a LOT of hours in Orlando when I was younger.
If you guys are going to have a car while you are there, you might want to hop up to Downtown Orlando to check out some of the shopping there, or if you're into music, to see if anyone worth seeing is playing in the area. I haven't been there in a while, but I do remember there being a fairly good amount of interesting shopping in the downtown area if you get tired of being at Disney itself.
As far as Disney is concerned, my favorite park is Epcot. But, it isn't really the park to hit up if you want rides. If you're into browsing around, snacking here and there, and having a general good time, the world pavilion is great. There is also a pretty fantastic smattering of different shops in the park in all the countries. Personal favorites, in terms of places to eat in Epcot, are the pub in the UK pavilion and the restaurant in Italy. For Italy, you usually need a reservation, but if you're staying on site, you can probably get your hotel to do that for you.
If you're looking for dinner with entertainment, I've heard that the Luau at the Polynesian is great.
In my opinion, the ultimate ride parks in Orlando are over at universal. Islands of Adventure is great, the rollercoasters are fun, the other rides are decent, the themes are entertaining. MGM is the Disney park with the best thrill rides, Tower of Terror and the Rock n Rollercoaster (or wtf-ever its called).
If you like zoos and animals, don't miss Animal Kingdom, but if that isn't really your scene, you could probably skip that park entirely.
I have never been to Pleasure Island at Downtown Disney, but I hear that if you like clubs, it is pretty much a great place to hit. Downtown Disney is also ok for shopping, at least as far as I can recall.
If you have any really specific questions, you can hit me up with a PM and see if I can help you out with suggestions.