I was looking through the posts, and someone made a remark to a fellow rookie about being "busy learning all of the odd stuff on a Hobie" (as opposed to a monohull). Okay sailors, what do I have to look forward to?

After years of sloops (and a few misguided adventures on a windsurfer) I think I want to try a cat, but I want to know what I'm getting myself into - preferably before I buy one! What surprises am I in for?