成语的 religions  can be divided into several classes,such as1 the abbreviation of fable2,in terms of historical events3,the application of words in ancient books idioms4 in past dynasties slang  5 new idioms....but actually chinese dont have their "favorite"idiom,because idioms used in the proper place can let a person feel shine at the moment..

          And in the first category,拔苗助长 i will recommend to you  ,for example:if someone do something want to take shortcuts but it doesnt work ,you can persuade him 你不能拔苗助长，要脚踏实地...

          In the second one ,my favorite this moment is 掷果盈车，the literal meaning is trow fruit company car... but it has a funny story in it (you can google it or connect me)and then it used to describe someone very charming(talented or handsome)

        in the third one ,i will recommend you辗转反侧，it is from a china's charming  classic  called 诗经，the majority has red this poetry,this poetry tell a story about a boy unrequited love in a euphemism way...(the poetry is very very beautiful...)and  this idiom means youcant sleep (to think anything )nowadays...

and the last two you can find more if you feel ineresting...

There are so many idioms in our daily life. Here are some idioms may be help you .

狼嗥鬼叫：形容声音凄厉。

喧宾夺主：客人的声音压倒了主人的声音。比喻外来的或次要的事物占据了原有的或主要的事物的位。

人声鼎沸：鼎沸：鼎水沸腾；原比喻形势不安定；现比喻声音嘈杂。形容人群的声音吵吵嚷嚷；就象煮开了锅一样。

绕梁三日：绕梁：在房梁间缭绕飘荡。（余音）环绕屋梁旋转三天。形容美妙动听的音乐。

七手八脚：原指比一般人多好几个手脚。形容人多手杂；动作忙乱