And even though Rose wasn't the best episode of Season 1, it still had arguably the best Doctor monologue -- his description of the Earth moving -- in the show's history. If you know nothing about Doctor Who and want to "get it", listen to McCoy's soliloquy at the end of Survival, and Eccleston's meditation in Rose, and that's all you need.
And for the kids, indeed for us all except those who saw An Unearthly Child when it first aired, it captured the wonder of entering the TARDIS for the first time. We all knew it was coming, but that moment when Rose first enters the TARDIS was pure magic. I felt what the first audience must have first felt, and I've been a fan since the mid-70's.