I always really liked her. Which, I'm a big G/J fan so of course, that's not too surprising. I liked her because of her quick wit, and obvious cuteness with Giles, but besides that, she was just a cool character because she had so much depth: a gypsy raised in a culture where her duty to her family was priority; so she went to Sunnydale to fulfill her destiny. Which is a big deal; I mean if this tribe is still punishing Angel, being the one who keeps an eye on him must be comparable to being the watcher who is assigned a slayer (parallels Giles!). So she takes this new identity and she saw it as job, but then as she got involved with the Scoobies, she started to want to have this new life as Jenny Calendar, the computer science teacher, and so she slowly starts leave her old life behind and stop writing her family (which is a huge deal for her culture) as she fell in love with Giles. And she wasn't honest with Giles and Buffy about her reasons for being in Sunnydale, but she didn't know Buffy was the slayer or that Giles was her watcher until Prophecy Girl, so it's not like she sought them out to betray them. And I don't believe she pretended to be a very different person then who she really was- I mean, we know she was sent to Sunnydale to watch Angel, but you can't just fake being a computer science teacher so we know she really was a technopagan. With all that tugging between her upbringing and the new life she wanted in Sunnydale, I thought she was portrayed as very conflicted which seemed real.
I would have loved to have gotten to have more of her in the show, to fill in the missing gaps about her life. She had such an interesting back story, I was sad to see her go so soon, and how some people didn't like her for her betrayal of Giles and the gang. Of course, it would have been good for her tell Giles at least what was going on. He did tell her about Buffy being the slayer which is a no-no, but being raised in such a tight-knit culture, I think the fact she was so conflicted about her 2 lives and how sorry she was proved how much the Scoobies meant to her.
Why must Joss kill off such good characters?