I know that (아/어)하다 is used for other people’s desires (3rd person). For 1st and 2nd, you would just use the regular form. However, it is acceptable to use (아/어)하다 in 1st person if you are referring to an object, such as in “제가 친구의 성공을 너무 기뻐했어요.”
However, I have also seen that 좋다/좋아하다 is sort of an exception to this rule since it can be also used in 1st person. Or is it just following the last rule I said?
What I’m trying to ask is, is my perception of how (아/어)하다 is used correct? If not, then can someone clarify? And does (아/어)하다 make descriptive verbs/adjectives into action verbs? Or is it something else?
Thank you in advance!