I don't put anything on my weapons because I hate dealing with soultraps and soulgems.
Me too. Once I take the time to go grab the star of Azura and can enchant a weapon with both soul trap an another effect (or the combo fire / trap) effect, I'll do i on my main weapon. Until then, its a plain Skysteal Greatsword, ideal for "Elemental Fury".
However, I do carry a pair of legendary Dwemer bows, one with 20 frost damage, one with 20 fire. I pretty much only bust them out for dragons that I can't reach; the fire bow gets used on frost breathing dragons, and vice versa.