I really love the looks of my Synodontis Petricola. But I feel sorry for the guy, 4 days in the tank and I think he is still looking for his school. Fortunately all the cichlids seem to completely ignore the little guy.
Hard to decide between my Queen Arabesque pleco, assorted botia loaches, and the syno cats. Each one has characteristics I enjoy, though in the end I think I would miss the loaches the most as a group, and the Queen the most individually.