Hmm... bettas!!! Personality 101. I also love sailfin mollies, but I couldn't tell you why. I just love them. There's a big, big gap between the thin, ill, small hybrid mollies sold by most pet stores and a fully grown sailfin molly kept in a large brackish tank with plenty of swimming room, in a decently large mixed-sex group to see their natural behaviour. They are really stunning fish. I'm also a big fan of bumblebee gobies, for their colour and their foul tempers... it's so funny to see a fish half the length of your little finger chucking a tanty...