I myself enjoy playing the paino in my spare time,while I'm completely involved in it,I can create a new tune or change a part of a master's piece with a radically distinctive sound effect but can be accomodated in the whole piece.Yeah,your own piece of music can be surely caught out the similar places with the others in some ways,but it cannot be prevented in most of the times.It doesn't matter.Since you've tried for once,you can have another chance to improve.
Creating your music is a fun.It can show your own style and characteristics to others,besides,it can show your intelligence.
Well,what kind of musical instrument can you play?Do you like creating your own music?What's your way of creating it?
