Like a lot of people my age (25) I started to draw more serioslly watching Dragon Ball on TV..and I didn?t give up until I felt I was as close as it gets to the original style...of course later on I started drawing other things too haha...but latelly I felt like I should play my homage with some of these! 
I learned the superman versus goku was a common theme in the forums around the net...haha