The problem is that everyone (well lots, anyway) wants a paint to dry
instantly and for white to cover black in one coat. Naturally the
paint mfgrs adjust their formulation to try to satisfy these demands
but in doing so they sacrifice the self-leveling characteristic. The
instant-gratification crowd probably don't care since they use rollers
which spread out the paint enough to cover and they've already
accepted the inferior dimple finish.

Surprisingly the cheaper the paint the better the self-leveling or so
it seems to me. Floetrol might be worth a shot, too.