As far as trout flies I use 99% of the flies I've tied. The other one percent is from stream side, and this is mostly for a fly I don't have the right color for at the moment (this is usually a woolly bugger), the right size, or ran out of (sometimes from catching a lot of fish, often from catching a lot of trees). Before I started tying flies I would buy them, however when I started tying my own I found I had better luck catching fish no matter how bad my flies looked.

As far as Bass flies go at the moment they're 100% store bought. In the past I just used large trout streamers for bass, but several weeks ago I decieded to buy some to try. (an assortment of flies including poppers). Well with the exception of 2 pickerel I haven't caught jack, however I'm still having good luck when I switch back to the trout streamers.