Goodness... this is a tricky question it all rather depends on what your family like to do.
Disney is so much more than rides.. I cant stress that enough.. its not like any "theme park" you will have been to before.
Now dont get me wrong.. there are rides there and we do go on them.. but thats not where you will find the majority of the magic.
I dont like rides much.. infact I do very few of them indeed - but the shows, and other stuff that is not ride related is amazing too!
the thought of going to Disney, and not visiting Epcot

and missing out on world showcase would be such a shame to me.. all those countries and cultures, where you can see, touch, smell, hear, taste and buy (hey this is Disney!!) something from another country is amazing!
Thats before we even start at Animal Kingdom... which is our favorite park.. again the theming and cultures and shows! PLUS all the animals on the safari, Dinoland..
MGM... well I think its great, but if youre not into films/shows etc.. I suppose you could leave it out.. although we absolutely love this park too!!!
If your family love thrill rides and are not bothered about the thememing and the entire "experience" _ I would probably go to Islands of Adventure over Disney (although there isnt too much for your 4 yr old there) -
if you want to savour the experience, then go to Disney!
