I have a weakness for FQ bundles, even though I prefer putting fabric for a quilt together myself. Those bundles are so visually appealing!
If it's a Civil War bundle, I don't keep it together because I think Civil War projects are most likely going to be scrappy. The other bundles, I keep together and keep on the lookout for a pattern for them. However, if I'm doing a scrappy quilt, I have raided those bundles without qualms. I prefer adding outside fabric anyway, so I figure I can replace the missing fabric with something if need be.
I often encounter free pattern downloads when googling the name of a fabric line to see where it's available for sale. This is my best source of patterns for FQ bundles.