Quote from Mizi
The thing with cliches is that it gets sorta boring. They can be ok if it's like three manga... but after reading like 20 with similar characters, plots, ending, it gets boring and dull.
Totally agree with this.
And it isn't just limited to shoujo or manga. Cliches in any demographic, belonging to any medium (novels, movies, anime not excluded) tire you out. It's a waste of time (and in some cases, money) to be reading / watching stuff that reiterate the same tired plot outline over and over again. And it's definitely a let-down when you were expecting something new and unique, just to get the same old drivel you've been seeing since infancy.
"Cliches makes things fun" is some people's view of the matter. But actually, the only reason you think such a thing is fun is because you haven't had enough experience in the field. Once you've read a lot of manga, the cliched shoujo formula will no longer succeed in keeping you entertained...not unless you're the kind of person who enjoys predictability and boredom