Father's Day category is a little light on subject / themes in comparison to relationships. I think Father's Day would benefit by having nautical and hobbies categories added.  
 
I've seen some cards in "general" that would be a good fit for hobbies and I've seen some cards in "other" that could also go into hobbies.  
 
While I'm thinking of the hobby category, I realized that there isn't any hobbies in the collections. The only hobbies is located in Birthdays. Just some food for thought.