Why IS Iroh this beloved by fans?

Let me start by saying that I too love Iroh as a character. I enjoyed every minute of screentime we got with him, but if you were to ask me what exactly I like about him, then I don't think I could really answer that. At least not in a way that I feel would do it justice (If that makes sense)

So I really wanted to hear the opinion of some other people as to why Iroh is so beloved with people and what exactly people like about him.

!^(Sorry if common question/discussion, but i found no topic on this recently.)!<