When you're full of joy about a person, a situation, a place or a thing,

当你对一个人，一种情况，一个地点或者一个事情特别有好感的时候。

I'm glad 课堂 - SpeakingMax英语口语达人

I like" is a pattern that's used when you feel good about something, when you want more of it.

当你对某物颇有好感而希望能获得更多时，你可以使用 “I like”句型。

I like课堂 - SpeakingMax英语口语达人