One shape I've been getting good reports on is the use of a slightly curved-in lip. This allows for "scooping up" to complete consumption of bowl contents. This is best for meals like cereal, soups, chili, ice cream and deserts. Things you want to get to the last drop. However, you cannot pour liquids out of this bowl without making a big mess. Not so good for dry or bulky storage; not easy to balance limes or tomatoes on the rim, etc.
This bowl shows double glaze coating of BBB and VB (explain later). The VB causes the BBB to become more transparent and it is this combination I play with to get multiple variations on brown gold and earthen greens. On dark clay it becomes almost black with blue streaking (see other samples).
Oh yeah, there's a small dimple in this pictured side of the bowl that was made in the wet clay by accident but does not affect the functioning and in some cases may be a desirable flaw that verifies the "hand-made" quality.
Oh, I make dip and salsa bowls this shape but heavier.