I definitely try to go above and beyond with live mixing and scratching.
Technology has made it much easier to make and manipulate music. Studio-driven, machine-driven music does not always transcend into being a good live act. Many current acts are great live, but many cannot cut it live. The music is not organic.
There are things I can accomplish in the studio via manipulation on the computer or some kind of effect that are nearly impossible to do live. On the flip side, there are some things that happen live that can't be pulled off in the studio.
These days, DJ's are the ones who are bringing fresh sounds to the music world. In fact, they are creating a new spatial music. They are the space transformers of the universe.
I can't imagine doing a DJ set and playing all my own stuff; it'd just be awkward.
I like live-sounding things.
I would never lay down a pre-programmed set and perform to a pre-mixed CD; I would never cheat my fans like that.
With some electronica acts, you see them live, but you're not really sure what they're doing.
A DJ can't just play one song. It's about playing a set, or how you connect songs in those two hours, and where you place them.