If you knit or crochet, you may already realize that "scrap" blankets are a popular project these days. I appear to have bought tickets on the crazy train when it comes to blankets the past couple of years and have several in progress. Some of these get worked on regularly, some sporadically. I consider them all long term projects with no deadline (except for the one that will be obvious in a moment).
The crazy began back in January 2015 when I decided to start a sock yarn blanket. I use a lot of fingering weight yarn, for socks and other projects, but I always have at least a partial skein left over. I'm doing 31 stitch squares on US1 needles, so each of my squares only uses about 3g of yarn. I've been throwing more of the larger squares in lately because I've been using more self-striping yarn and it takes a larger square to really show the stripes.
Barn Raising Quilt that a lot of people have made and called it my Bandwagon Blanket. I start off my squares a little differently, but it's the same effect. So far I've made 14 squares for this. I'm a little more choosy about which yarns I use for this, sticking to ones I really love the colors of or ones that are colors outside my "norm" so there will be some variation in the end product.
The Suburban Stitcher podcast for this next one. She started a granny square blanket out of sock yarn, and after seeing it several times on her podcast, I had to have one too. This is basically a big granny square that just keeps getting bigger. I started it in December 2016 and I'm using a 3.00 mm hook and just crocheting around and around in whatever yarn I pick up next out of the bag.
The final blanket is the only one that's not a scrap blanket. I did start it out of leftover worsted weight superwash yarn I had on hand, but I've already had to order some more of some colors, and I'm sure I'll probably need more before it's done. This one is my 2017 Temperature Blanket, which I'm making using the Groovy-ghan pattern. This is also a crochet blanket, and I'm using a 4.5mm hook. Basically, I do one stripe for each day of the year and the color of the stripe is determined by the high temperature for that day. I'm about a week behind on this one because of trying to finish things for Frolic, but I'm generally trying to stay on top of it by working on it every 2-3 days. It's going to be a large throw blanket when it's done, but not wide enough to cover a bed. This picture shows January and February.