while i really really really really (have i mentioned really ) like epcot, id have to say that its my least favorite park. i guess that if i could only go to one park i'd go to MK. im not saying its my favorite cuz i love goin to mgm, ak and epcot too, but it has the most rides + splash mountain!!!!!!!!! i know a lot of ppl arent too big on AK, but i love it! i think its the park thats themed the best. you really feel like youre in another place, not in a park in orlando.
I think they're all great, but if I'd have to choose it would be Magic Kingdom because it gives you that tingly Disney feeling you get whenever you see the castle...