i agree with others about the comp's; not really compelling but understand your top-of-the-sink limitations.
i'll add that the drops are soft. looking at the EXIF, depth of field could be an issue on a couple, but i think it may have to do more with motion blur than aperture. from what i understand, shorter flash durations (lower flash power) are actually better for high-speed photography. i am just throwing numbers out of my rear here because i don't know what they are, but for explanation's sake, full power (1/1) may have a flash duration of 1/800 sec while low power ( 1/128 ) may have a flash duration of 1/35,000 sec. since it's the flash that is stopping the action, slower is mo' better.
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