Its your shower curtain - do what you want - you are the one who will have to look at it everyday lol Why torture yourself everytime you look at it and have the applique thought in your head I say go for it.
As far as asking someone elses opinion - I dont have too many people I can ask! My DH says its your project do it however you want -I sure dont ask you how to do my woodwork unless of course I am making it for you. My daughter says she cant help - the colors I have picked she wouldnt or couldnt imagine putting together but once its done she likes it!!! I have a girlfriend that is too opinionated on everything so I dont ask her opinion about anything. Tried several times but she always has to add something - its never what she would have done lol Dont get me wrong she is one of my best friends but I just take some of her opinions with a grain of salt and move one lol cheryl :D