Really, any role that Eliza had was wonderful and made me fall in love with the character. There is just something about this actress that is so wonderful, intriguing and interesting. Plus, her characters are always so mysterious, and I find myself ready to find out what's next for the character.
First and foremost, her biggest role in my opinion was Faith on "Buffy the Vampire Slayer" and "Angel." That's the role that defined her as a great actress to me. Then there was "Tru Calling" where she played a different character, and she was very great in it, just like she was in her other project "Dollhouse." Really, Eliza was the most important reason why I watched that show.
I can't wait to see her in some other role, but I hope it will be something that lasts longer than the last two series she was the main star in.