Incidentally, does your copy have the original unbroadcast pilot version of the first episode? It's more-or-less the same script-wise but the Doctor is even more bad-tempered and unlikeable than in the broadcast version. Apparently one of the reasons it was re-shot was because they decided that the character needed softening - and, after watching it back, even William Hartnell himself agreed with this and was keen to give it another try.
Also, Susan is pretty weird and scary in the pilot.
I like that. I think it was something they were aiming for because although she looked like an ordinary (sort of
) girl, the audience still needed to believe she was from another world.
An Unearthly Child, while not at the top of my list of favourites is still a really good story. It sort of loses its way in episode 3 but then finds its way back to a brilliant concluding episode. This is a story, whether you are a fan of the classics or not, that every fan should watch at least once to see how it all began