One of my favorite beaded bead is the tqb. It is simply a homogeneus bb formed by 11/0 seed beads, with the peyote technique. You can find it in almost all the wooden sizes. But this simply bb's let you make a lot of different compositions. For me, one of the most versatile.
You can find patterns for 6mm tqb, 10 mm tqb, 12 mm tqb, 15 mm tqb and 20 mm tqb just clicking over each link. The last three tqbs explanations are more complex. If is your first time, you should first try with the 6 and 10 mm tqb explanation.