I was a big fan of Blake's 7. Even preferred it to the original Star Trek. (only Red Dwarf beats B7 in terms of favourite sci-fi progarmmes.
With Avon on your side, you always felt you were going to come out on top in any scrap. Along with Orac, they were unbeatable.
And as someone mentioned up thread, the sarcasm in Avon's replies was a joy to hear.