recently, i asked myself this question and from then on everytime i watched a movie/read a book/read comic i asked myself "why".
so now i noticed that for me the characters matters for me the most. maybe in the beginning i will care more about the plot and that is what makes me continue watching/reading but if i stay it means i love the characters.
for example i am reading a series of books right not called magisteruim and i really liked the first book (the action and the world), but now as i read the 4th book i noticed that even though i don't like the plot that much i am staying and reading it for the character XD
and with a tv series names arthdal chronicles, when there were too many fighting i noticed that while they interest me i just want them to get over so my favorite characters (who were separated) will finally meet.
so for me the characters are the most important (even though i myself didn't know it sometime ago lol), and of course their development as a character.
and about cliches, i really don't mind them as long as you don't overuse it. if you stop for a moment and think. you will realize that almost (if not all) everything was already made so it is hard to be original (i dont mean that you can't be original, i mean that no matter what book you take you will be probably find similarities of the book with other book and etc, same with comic, movies and etc)
so don't beat yourself over cliches when writing as long as you thought about this thing yourself and then realized that it is similar to some cliche you know as long as you don't go to google and copy the cliches XD
(that is just my opinion)