So you're pretty much an iTunes DJ, if a DJ at all. Really annoys me when people regard themselves as a DJ when all they do is play a tune, fade out, fade in etc. No DJing there at all. All you're doing is playing music, anyone can do that. Electronic music has formal structure, unlike anything guitar based, therefore tunes actually fit together.
Try watching someone like Friction, Andy C or Youngsta; they play for anywhere between 1 and 6 hours on 3 or 4 1210's. That is proper DJing.
Beatmatching is the absolute basic element of mixing music and anyone who claims to be a DJ should know how to do this. Alongside this you need to know how to read music, in terms of counting beats and phasing. Then comes pitch riding, crossfading, EQing, double dropping, triple dropping, cutting, beatswapping, scratching and hundreds of other styles.
All of this comes before learning how to read the crowd, harmonic mixing and actually knowing what tune to play next. You can't just play any old tune as it won't sound right.
As said by Fabio:
"Anyone can dj...But very few know how to play the right tune at the right time..You can't teach someone how to do that"
