I dont have any gravel in my discus tanks either and I like it! Boy can you can the tank nice and clean.
Gravel is not really nesseccary in a tank! I sometimes want to renovate my 90G planted to bare bottom and used potted planted instead. Maybe someday!
On the other hand, gravel does give the tank more a 'natural' look (that is if you stay with natural colors). I guess it is you choice.