Aura Whisper is one I found myself using more often than I expected. Cyclone is a fun one. I admit, most often I stick to the classic, Unrelenting Force. There's just something satisfying about shouting someone off a cliff.
The only one I used somewhat regularly was fus-ro-dah so that must be it.
Unrelenting Force with the
I'm doing my first play through on Legendary. I'm not using any ranged attack and limiting magic to restoration and alteration. I'm really counting on Shouts to event things up otherwise melee is just grim. I've only got Fus so far and that buys you a little break, just enough to get the initiative, but not much more.
What I really want is Slow Time - that's gotta be the ultimate Shout for day-to-day survival.