I got to admit, I like all the characters. Their personalities work so well together so there isn't really anyone I hate. And yes I must agree with you about Klinger's sense of style.
It took me sometime to like Frank but after a while I learned to love the ferret face, mainly I just love it when he gets insulted or just him being too patriotic. On terms of favorite episodes I thought the finale was just amazing but a normal episode would hqve to be 5'oclock charlie.