Gardening, birding (a little), crosswords, learning the piano, panto once a year (oh no it isn't!), occasional guitaring, jam making.
I'm always on the look-out for new hobbies. Mrs Noel fancies wine making so we might give that a go.
I'd say reading but I think you need to read more than 4 books a year for that to be true, and we're covering that on another thread.