<iframe title="YouTube video player" width="560" height="349" src="http://www.youtube.com/embed/kenF3_77774" frameborder="0" allowfullscreen></iframe>
Didn't like the vocals at first, then got convinced otherwise after a minute or two because of the melody of the piano and xylophone. Everything seemed to fit in perfectly onwards.
<iframe title="YouTube video player" width="560" height="349" src="http://www.youtube.com/embed/9r3J-Vve89Q" frameborder="0" allowfullscreen></iframe>
As i discovered a few years back, listening to these guys while working on multiple pieces of plastic can make for a pretty zen-like experience.

<iframe title="YouTube video player" width="640" height="390" src="http://www.youtube.com/embed/9jUtYVm3MzA" frameborder="0" allowfullscreen></iframe>
<iframe title="YouTube video player" width="425" height="349" src="http://www.youtube.com/embed/zti0cWaYxpE" frameborder="0" allowfullscreen></iframe>
Panty and Stocking's soundtrack. HELL YEAH!
Samurai and traditional Japanese instruments over a rock music backdrop is awesome
I love overtures
EDIT:
Here's a drum cover of William Tell's Overture
EDIT 2:
OMG OMG OMG
Friday Orchestra version
...It's pretty @__@
Swagger incarnated into music.
<iframe title="YouTube video player" width="425" height="349" src="http://www.youtube.com/embed/AH2az_j1pLU" frameborder="0" allowfullscreen></iframe>
Gotta love the part where the song really kicks off. Been listening to a lot of these guys lately, in order to prepare myself for the new album coming out this month.

I couldn't find a full version of the one in the movie Hop, so this is as close as I got...
His smile annoys me to no end :/