Depends on the figure and how the helmet looks.

Like with Star Wars...I don't see the need for removable helmet clones and stormtroopers who never removed them in the films. It doesn't look as good, paint rubs off the head, and used figures in the future are likely to be missing helmets.

I could've done without the removable helmet feature on the crimson guards they made, while a cool idea, it wound up looking worse than the 1985 release. And what's under the helmet...is it Fred from the comics?...no, just a masked generic face.