If you're getting the major channels (ABC, CBS, NBC, FOX, CW) then the only thing that Huluplus would give you access to that you might not already have is a crap load of BBC shows. They've also got some original programming,
but nothing jumps out at me so far.
I've watched several Hulu Originals (just using the free version of Hulu, no Plus) and have enjoyed several of them. Quick Draw was really good, as was The Wrong Mans. And I got some guilty enjoyment from Pramface and Fresh Meat. Just started on The Awesomes which seems decent. Moone Boy was alright. Deadbeat seems OK so far...probably another short-lived one for Tyler Labine.
Other than that, even the free Hulu is great for catching shows on the major networks. You generally have to wait a week, but that doesn't bother me.