When I'm there in person, I get "that feeling" from the MK train station. It's more exciting to me knowing I'm about to pass under and enter Main Street than it is once I'm there looking at the castle (the castle, for me, is best viewed from across the lagoon).
I would normally say Spaceship Earth, but when I think about it it's honestly been years since I've gotten "that feeling" from looking at it in person when I enter the park. With the wand I could never really look at SSE and "feel" the that feeling that took me back to my childhood, back when EPCOT was a totally different park. It's still easily my favorite park and SSE is the structure I most marvel at, but it hasn't felt like much of an "icon" for me in a while. Looking forward to seeing it naked on my next visit though!