I am still working on my On Ringo Lake by Bonnie Hunter, haha! I don't know if I will ever do another BH project but I do like to follow her. When you are focusing on using a ton of scraps, I haven't found anyone better to get me organized.
The only block/ pattern I can think of that was a real problem for me is the apple core. After getting a placemat size sample started I decided it wasn't for me. I think it works great for hand piecing but not as easy by machine.
There isn't one particular pattern that I have made and said "never again".