I don't target catfish either but seem to always catch some nice ones when I least expect it. Best patterns have been bass-size buggers, Clousers and hare worms although I did catch one last summer fishing for bluegill using a popper with a prince nymph as a dropper. A nice 22" cat took took the nymph and the race was on with a 3 wt rod and light tippet. My personal best is a 28 incher on a lime and chartreuse bugger.