From my perspective, I get to use dual only when I go for the enchantments/powers that 1-handed swords give. Being cummulative, these can't be substituted with any single two-handed swords.
However, I tend to be most comfortable with two-handed swords, more powerful in hitting and quite a blast to the ego too. hehe I just can't seem to observe the extra attacks dualweilding is supposed to give. It still seems that my dual-wielding characters still get clobbered in between hits. By the way, most of the time I dual-weild, I tend to use the flail of the ages as they rock against trolls.
