You should definitely go on the Riverboat, it's very relaxing. The Swiss Family Treehouse is quirky with a fab view from the top.
The only attractions I have missed are ToT, Test Track, RaRC etc because I don't like that type of ride. I think I've pretty much tried everything else. I am, however, still trying to coax DH into the Tiki Room... He still hasn't recovered from IASW.