Definately Epcot. We usually go to Epcot for at least part of every day of our WDW vacations. We like to stay in the Epcot area. Both FW & WS are amazing to me. I love Science & Social Science, so Epcot is perfect for me.
I am surprised to say that at this point in my Disney Life, AK is coming in second place. I am enthralled by the themeing. Even if I didn't set foot on an attraction, I could just wander AK for hours, soaking in all the detail, watching the animals, enjoying the music. It used to be the one Park I skipped & now I love it.
This coming trip is a short one, Epcot & AK are probably the only Parks we'll do.