Mmmmm....have to think on that question.For me, a string quilt & rag quilts are easy.Like others have mentioned,making the same pattern is boring.
A lot of ppl say the log cabin is easy,but that was one of my 1st quilts & it was not easy at all.The blocks were/are wonky,but didn't know how to square blocks.
Maybe I will make another one,just to see if I've improved!