It would be nice to be able to specify that a Category is required for a given Channel.  You allow a default to be set in Channel Preferences, but that just doesn’t work all the time.

Thanks for considering it.

+1 well overdue feature

+1 - I’d like to specify a category as required in a Safecracker form.

Agreed that this would be great. In the meantime I’ve used the BW Required Category plugin and it worked perfectly: http://devot-ee.com/add-ons/bw-required-category