My all time favorite pattern to use up scads of scraps is Path Through the woods:

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peace

My favorite is "Scrappy trips" by BOnnie Hunter at quiltville.com. I am making one right now.

My next scrap quilt will be Snake River.

I like simple patterns like log cabin, crazy quilt or strips.

Arkansas Crossroads, love this pattern for scrappy!

When I am in the mood and want to get rid scraps I do crazy squares. You can use up a lot of scraps on one square.
They are always so pretty.

I love to make crumb quilts with scraps.

Guess it depends on what "look" you want.
There's scrappy and then there's scrappy. :eek:

Here's one I made..

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I like to do courthouse steps. If you have enough similar fabrics to do all of the centers, it gives a very cohesive look.

For me it would be string blocks.