I don't think I can say I have a favorite scale due to reasons of similarity of notes. When you look at the seven major/minor modes they are all different degrees of the Major Scale and share the same pool of notes. Each mode sounds different because of the arrangement of the intervals, etc., but they all produce the same melodic sound once you are involved in phrases with in a certain key etc. I also use alot of Harmonic/Melodic Minor scales, Pentatonic (who doesnt start off using that), Alot of different Altered Modes to give me different Jazz scales/modes, blues scales, and the Whole tone scale. I rarely use other exotic scales since they are often just modified versions of the modes, leaving out/adding more notes.