I was just wondering what everyone's opinion was regarding the most usefull and the most fun shouts? What do you use most often? What is he most fun for you to play with?

Unrelenting force is good at level 3 for blowing people off high drops. Or just giving you more time to shoot with range.

I just discovered freeze which paralyzes for a good 20 seconds unless you attack them.

Ethereal shout + unrelenting force + marked for death. I've got about 17 but barely use any of them.

Lighting will kill your companion. If you have one don't use it.