First of all, is it worth it?

Second, do you mostly powerattack with both weapons or just mash fast attacks?

Third, what combo of weapons do you use?

yes
Start with power attack, then fast attacks until I get the opportunity to repeat
dual axe wielding Orc

dagger
full power attack
if im out of stamina i just hit with the strogest of the 2 i have in my hand

Dual steel swords. It's totally worth it in damage output, provided you have the armour to take a few hits as you're unable to block.

I usually perform the dual weapon 'fast' attack mixed up with the individual weapons' fast attacks. It takes people, and more importantly Falmers down pretty quickly.

Blade of Woe in my right hand and Nightingale sword in my left. But also have chillrend and a glass sword that does 15 fire damage on me as well.

Dual wielding Mace and Axe. with 35% attack speed from perk tree and elemental fury shout. After a power attack i hit atleast 3 to 4 times per second, ripping anything apart. It is absolutely awesome to dual wield.

Dual Wielding Swords, rarely daggers. I use to use daggers with one hand, cuz I'm a assassinz.

I do RUN to my enemy and fully double-combo until the enemy get low health. Then I step back a LITTLE and start attacking normaly untill he's dead.

I still want to try out dual mace.

I am quite low level so I've only just started properly dual wielding. I've got a flaming steel sword in my left hand and a shocking orcish axe in the right.

The power attack opener and a few rapid attacks tears through enemies insanely fast, it seems to have some built in combos or something. Love it.