For me, pads can be used to transform a "general style" more closely into the specific song you are trying to perform.... if there is a certain fill or melodic riff that recurs through a song, pads can be used to help the style replicate the song.... also agree with Bruno - pads can often "lift" a style and help give a more live feel.
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Randy

PA4X, SX900 (Baby Genos), Roland U-20, L1 Compact, Way 2 Many Saxes

"My computer beats me routinely at chess - but it's NO MATCH for me at kick boxing!"