I think it would be best to do an equal combination of the two. Since each new volume has two girls getting bukkaked, one girl could take it all on her face and the other drink/swallow. But whichever is being done, the way the girl is positioned makes a big difference. It's also important that she stay still and not move. The two bukkakes where the girls' faces got nicely plastered were Missy Monroe's bukkake in AB 26 and Sabrina Jayde's in AB 13. Missy Monroe actually experienced a lot of distress during her bukkake which I thought made the scene more erotic. For bukkakes that involved swallowing, I thought Trinity James did the best scene where she drank all the cum from a glass cylinder without spilling a drop. I think equal emphasis on both kinds of the bukkake would keep the AB series more interesting.