For sunfish I want durable flies because I catch a lot of fish. Commerical foam or cork poppers seem to work best. I haven't been able to tie anything better. For bass, I've found nothing better than the big deer-hair bugs in large sizes (Size 1/0 or 2/0 hook.) Hairabou dressing for the tail helps deal with the weight and water retention problem with bugs this big. I also use a good floatant and drying crystals to keep the big bugs in good fishing condition. When tying such bugs it really pays to reinforce them so they don't unravel. If you take care with construction, they will last a long time. If you are buying your bugs, get some fly tyer's head cement and add more of this cement to the wraps of thread near the eye of the hook. This is good advice with any purchased fly.