The "do fish feel pain" thing will always always come up. As hobbyists (and many of us keen anglers too), we would probably hope that they don't feel much stress or pain because lets face it keeping fish in a glass box or yanking a fish out of the water with a hook in its mouth are two instances where you'd think stress and pain were pretty much up there. But the truth is, until evolution allows fish to talk, or scientists come up with some concrete evidence, we will never ever know.
So in the meantime all us fish lovers just need to carry on what we are doing and treat our friends with respect and look after them. And i think most of us already do that so well done us.