I do love the accounting issue (Cap's like my mom when it comes to saving receipts) but I think my favorite filler issue for the Busiek run is the one where Jarvis is writing a letter to Black Widow to let her know that he understands why she disbanded the Avengers. I think maybe I didn't care for the art too much (It's been awhile, I need to reread it) but I remember it made me love Jarvis so much, and I already loved him tons.