Our family never agrees on a theme, so we each do our own thing. I've been villager Belle, Alice and Cruella. The Cruella is my favorite costume, but the version I have (which was a Disney park/store Europe version) has a cape that comes down to my knees or below, so that would be banned under the limited rules if those are in place for the party. DH, who is not really a costume guy, uses the superhero costume T-shirts and regular shorts. I know at least of couple of those T-shirts have capes attached and I think the capes hang below the waist so they are probably out too. DD has been different princesses, villager Belle, Young Maleficent (AJ movie version), and a Haunted Mansion Ghost host (easily done with the T-shirt and headband WDW sells and a black skirt). There are threads around that have lots of pics of peoples' MNSSHP costumes. We have seen tons of cute couples costumes at MNSSHP- some are Disney themed and some are not (I remember a really cute Gru and Lucy). Last year it seemed like Anger and Joy (inside out) were the common pair- we saw a TON of couples dressed as them.