I agree with everyone else in that casting is probably one of the most deadly "go to" fishing tactic. You'll meet lots of people who focus on one or maybe two presentation approaches mainly because of its convenience and cruise-control pace for covering water with multiple rods, which is deadly too. But, if a person truly wanted to be the best crappie fisherman that they could possibly be... they would choose to be as good as possible at every type of presentation methodology and tactic... as in patterning the crappie's year around biology and migratory nature... a well rounded presentation tactician will fair better under all conditions and patterns.