All of our posts should implicitly acknowledge the Appule Arc's superiority. It's not worthy of being compared to other DBZ arcs (or vice versa).
The only good arcs (besides Appule's, of course) in DBZ were the Saiyan and Freeza arcs. Cell and Boo both kinda stunk; not sure which I would pick between the two, honestly.
The 21st and 22nd TB were a lot of a fun too. I hate the 23rd TB though, and I don't particularly care for KP's arc either. RRA had potential, though.