Getting new yarn (even someone else's old yarn) is tons of fun! I share your excitement and wish I could just look at it with you (some people might think this is crazy, but we're thinking about, "Oh, the possibilities)!
I wish you happy crocheting as you tackle your two "adult" blankets. If you get stuck and need some help, be sure to let us know.
And please do post some pictures when you're done. I think everyone here LOVES to look at finished projects as much as I do. They're such an inspiration.