I am a huge fan of Handjobs. My ex gave them much more often then my current GF, but my current GF and I have sex waaay more often. Anyways, I love receiving them, and don't really plan to ever give one to a Man.
I think whats so fun about them is the fact that you can sit there and see everything, I'm a very visual person, and love to watch whats happening, and while getting a handjob you can just watch her hands working you up and down, you can watch her facial expressions, her body. Also, she can talk to you the whole time where while giving head its hard to have the same dirty talk because of her mouth being occupied.
My absolute favorite, is when my GF and I give me a handjob at the same time. I stroke the bottom near the base, and she strokes the top near the head, the combination of different hands, different grips, different stroking and speeds, and the fact that there are two hands on my dick always pushes me right over the edge!