From what I saw, Eccleston's pretty popular. I know some people who wished that he'd stayed on for another season -- and honestly, I can see why. I really like how he played the Doctor -- someone haunted by his experiences in the Time War, justifiably angry, but deeply regretful, and ultimately, loving. I know episodes like "Dalek", "The Doctor Dances", and "The Parting of the Ways", to name a few, really encapsulate these qualities quite well.

I also like some of his more snarky humor as well. And his adorkable moments, like dancing with Rose on the TARDIS, for example. What about you? :)