"People assume that time is a strict progression of cause to effect. But actually, from a non-linear, non-subjective viewpoint, it's more like a big ball of wibbly-wobbly, timey-wimey... Stuff." -The Tenth Doctor
"Doctor, they've got guns."
"And I haven't. Which makes me the better person, don't you think? They can shoot me dead, but the moral high ground is mine!" -The Tenth Doctor (and Rose)
"This is my timey-wimey detector. Goes ding when there's stuff. Also it can boil an egg at thirty paces. Whether you want it to or not, actually, so I've learned to stay away from hens; it's not pretty when they blow." - The Tenth Doctor
"They're coming. The Angels are coming for you, but listen - your life could depend on this - don't blink. Don't even blink. Blink and you're dead. They are fast, faster than you could believe. DON'T turn your back, DON'T look away, and DON'T BLINK!" - The Tenth Doctor
"From the day they arrive on this planet and blinking step into the sun, there is more to see than can ever be seen. More to do, no hold on... Sorry, that's the Lion King." - The Tenth Doctor
"Oh, while we've been chatting away I forgot to tell you: I'm brilliant." - The Tenth Doctor
"Oh-ho-ho-ho! It's you! Oh, you're I love you. You know why? Because you're so thick! You're Mister Thick Thick Thicketty Thickface from Thicktown, Thickania! And so's your dad!" - The Tenth Doctor
Yes, I like the Tenth Doctor. I could probably fill a page with awesome quotes, I'll just leave it at these.