I prefer to shoot expandables because of the increased potential for accuracy under a variety of conditions and the increased cutting diameter on some models.

Having said that though, they are not for everyone because....

a) They require a certain amount of KE in order for them to function correctly...

b) Your bow still has to be tuned to get them to hit the target correctly and, again, function correctly...

c) Deflection on some models with longer blades during angled shots.