Classic Dr. Who Episode Recs? Anyone?

[hologrammatical]

Okay guys, The Christmas Invasion is still a long way off, my sad, wonderful, ridiculously well-traveled/loved/bedraggled TARDIS backpack is finally in near-shreds...and...dangit, Journey's End made me cry! And so...
..I think it's time I watched some Classic Who...don't you?

Which ones are your favorites? Recs please?