Izzy actually had to cut back on hugging people. One of her favorite things to do was hug people. And she'd kinda hug for any occasion. It's not something she picked up from her family. It's something that she started doing on her own. She just really loves hugs.
It was mentioned before that people generally like Izzy's hugs. She's very good at hugging. But not everyone's into it all the time. And Evey likes their space. Though they are open to an impromptu hug from Izzy from time to time.