Well I guess it just goes down to preference. I myself prefer Illustrator, this is pretty much the first adobe program that I learned to use to I had time to play around with it.
I use Photoshop occasionally but not enough to say that I can hands down do anything in it. I like for editing and cleaning photos, but everything I do is in Illustrator. When you are a graphic design student (me) you do alot with logo design and typography so Illustrator to me is easier to use for those projects.