Mine is Amanda Vale, what an amazing character arc and development she had, from bad/rude gyal to good girl.
What I loved about her is that in the iconic era with the Hunter's, Josh, Dan, Leah etc the character was sassy, fiesty, complex, bitchy, interesting, fun, unpredictable, entertaining, scheming and I adored her/Josh double act in the Project 56 memorable SL until it all went wrong.
What I liked is that she took on most of the goody two shoes hypocritical characters who acted like butter wouldn't melt and yet then either themselves or their own loved ones broke the law at times