I agree, sometimes it seems like the hot color changes every time you go. Almost every time we go though, by the end of the day it seems like there is always one or two colors that account for most of the bites. Sometimes it's suttle too, like you'll start to notice that you're getting the most bites on one color but they're all short fish while another color that isn't getting bit as much is catching keepers, wierd. A lot of people think that trolling cranks is just a reaction bite but you just see certain colors get hot way too often for it to be a coincidence.