Huh, that's an interesting way to feel! I wish I remember what AIM felt like better; I was so young when I used it that any chance I had to IM people was exciting. I was probably an absolute pain in the ass.

D'you think this could be — at least in part — because Facebook is an always-on environment for a lot of people? They're not explicitly on to chat, so there's more of an unstated barrier to beginning a conversation.