OK, so we all know that the NuWho, 2005-onwards phase of Doctor Who is arc-heavy, with each season comprising of an arc of its own, and arguably there's a unifying factor for the era in which each Doctor operated (the Bad Wolf for the Ninth, Silence for the Eleventh)... but even OldWho had its season-long story arcs (not to mention its own overlapping arcs, like the Doctor's Earth Exile, and smaller arcs like the Black Guardian's revenge in Davison's era), most notably the Trial of a Time Lord one in the mid-80's.
But which of all of these is the best? Or, rather, your favourite? Do you like two of them almost equally? Please share your thoughts with us all.
And, enjoy the debates!
NOTE: The "Space Station Nerva" and "Entropy" arcs might be lesser known, but they're Tom Baker and first and last seasons, respectively. The arc in either is loose, but very present and apparent - especially in Entropy's case, where the reason the Doctor and Romana were lost in E-Space was because of problems in Logopolis, as said in the eponymous story.
Also, I listed only the TV arcs. I'm sure that there are others in Big Finish's huge line-up of stories, but I concentrated on season-long arcs mostly, and with audio I'm not quite up-to-date personally, so I apologize to those who wish some or all of them were included here (though I did almost include the Charley Pollard arc of Eighth's first two seasons).