I'm not fan of Dots, actually. While Eliss and Letterpress have their own rules and strategies (similar to Braid, for example), Dots feels too much like a Bejeweled clone to me.
Maybe I didn't give it a fair shot? What do you think?
it gets quite addictive when you want to get a good score. A small tip, make squares (2x2), this will clear the colour from the board.