YAAAAAAAASS I just got into it a few months ago, and I have a lot of catching up to do, but I f**king love it. My favorite episodes are Robot of Sherwood, The Doctor's Wife, and Blink.
Doctor who is rad. (Doing this from memory) People assume that time is a strict progression from cause to effect, but actually, from a non-linear, non-subjective view point it's more like a big ball of wibbly wobbly timey wimey....stuff.