I did a couple of hats with bobbles this week.  This first one uses Basic Lattice, pg 276, then a couple of rows of garter stitch before a row of bobbles and another row of garter stitch.  I continued up the hat with Diagonal Rib, pg 24.  I am not thrilled with the top of this one, but it is not bad enough to rip out and redo.  Besides, I am not sure what I would do to improve it.

The next one uses Ribbed Lattice with Bobbles, pg 277.  I reduced quite aggressively at the top so it is pretty flat. I like this top better than the other hat.