I loved her in S2, and again in S4, and I did enjoy watching her in the couple of SJA episodes I watched. But, yes, young Sarah... argh! Now, I know that the 1970s were a very different era, and if a woman didn't want to be treated as a sex object or told to make the tea she had to be more assertive - though, actually, I did like the way Jo managed to get the respect of people around her. And, while Liz could also be a bit sharp on occasion, she had much more justification, considering her qualifications and ability. Sarah Jane in her early twenties just comes across as a bit self-centred, know-it-all and needlessly abrasive. Still, that's all part of growing up :) It would just have been nice to have a bit of acknowledgement that she wasn't all that's wonderful, in the way that we know modern companions aren't supposed to be considered perfect. Though that's one of the many differences between Classic and New Who, of course.