Ehhhh, I have no feeling about this. My choice is The OC pilot, because I've watched it about a billion times and I never tire of it. I also think it really works on its own. It tells you everything you need to know about the series in 42 minutes. That's a well-done pilot.
Here are two reasons I like this pilot so much-- Ryan meets Sandy, and Ryan meets Seth. I love The Cohens.
Also, Pushing Daisies because it's called "Pie-lette." It's also really good in that same way of telling you everything you need to know about the series. The whole struggle is right there. I love the 2nd episode of Pushing Daisies more than the Pie-lette, though. Olive sings in the second episode. It's kind of brilliant. It was the exact moment when I know this show would always be in my heart. She did it again in the second season with "Eternal Flame," and I loved it just as much.
I'm going to fall down a rabbithole of Pushing Daisies videos now.