Daggers stagger very little, so if you don't Power Attack with them very much, then you wouldn't notice, because it rarely procs. However, they're fast, so I often use the left hand Power Attack to break Block, because the target is standing there for an easy hit, and the extra damage counters the extra defense. When they're doing that straffe dance, it's better to just DPS swing, because it's easier to hit then, especially with the poor Reach of a Dagger. Also, the Dual Power Attack is more likely to stun them, because of multle strikes in rapid succession.
Daggers stagger very little, so if you don't Power Attack with them very much, then you wouldn't notice, because it rarely procs. However, they're fast, so I often use the left hand Power Attack to break Block, because the target is standing there for an easy hit, and the extra damage counters the extra defense. When they're doing that straffe dance, it's better to just DPS swing, because it's easier to hit then, especially with the poor Reach of a Dagger. Also, the Dual Power Attack is more likely to stun them, because of multle strikes in rapid succession.