as an adult epcot is the coolest for me. my dad and i spent all day walking around the park drinking beers from each country. that was an interesting day. needless to say i didn't drive home that night.
also, if you are taking a little one (we had my nephew with us who was just shy of 1) we had to do a baby swap (rofl). they do not advertise this but it was a way for us to get fast passes and ride a ride a 2nd time quickly. we did this with soarin, went and got fast passes for us all. almost all of us went except for my sister in law and then we came back and went again with her while one of us stayed back.
http://www.mouseplanet.com/dtp/wdwgu...s/babyswap.htm
honestly i enjoy seaworld more than i do disney but that is just me. busch gardens isn't to far away also depending on how much time you have.