I honestly don't like crafting in single-player RPGs. It just ends up cluttering the world and your inventory with a crapload of random ingredient items.
that.
I think the way BG did crafting was the best. You had a small amount of very specific item obtainable at very specific places that you could use to craft cool and powerful gear. that is very limited, but it doesn't fill your inventory with crap and the results are always worth it.
