Easy?
I overwinter a lot of succulents indoors: agaves, aloes, euphorbias, cactus, and most of them are quite easy as long as they get a little light and are kept relatively dry.
Echeveria too -- I had taken their ease of overwintering for granted until a comment by Loree in her post today saying that her echeveria never last the winter indoors. Strange, because this one I have is so easy!