It's pretty much impossible to pick one's favorite Modern Family characters. Go ahead and try.
Added:
Mitchell and Claire hatch a plan on the episode "Strangers on a Treadmill." They seem excited over it here.
Added:
Get down, Jay and Gloria! The loving couple busts a move in this Modern Family scene.
Added:

Modern Family Season 2 Episode 4 Quotes

We fall a lot. Maybe you can be there to pick us up when we do.

Phil

Do I know McKenzie? I was McKenzie. I invented McKenzie.

Haley