There are lots of blocks that I like-log cabin, churn dash, pinwheel, etc. But if I had to pick one quilt pattern that I purchased and made over and over and really like to make it is Yellow Brick Road. It is super easy and makes a quick baby quilt. And I would know, because I have made at least 10 of them. Here is a link to the pattern so you can see it-
http://webstore.quiltropolis.net/stores_app/Browse_dept_items.asp?Store_id=588&page_id=17