All deciding opinions mind you by O'Connor
Horrible on Right to Life opinions
Planned Parenthood v. Casey (1992)--Stenberg v. Carhart (2000)
Horrible on illegal immigration
Zadvydas v. Davis (2001) and commentary there after
Horrible and woefully convoluted on religious liberty
Lee v. Weisman (1992)-- McCreary County v. ACLU of Kentucky (2005)
Horrible on campaign finance laws that ran rough shot over expression and speech
A slew of them including McConnell v. Federal Election Commission PDF (2003) where she was again, the deciding vote
Horrible and hypocritical on affirmative action
Grutter v. Bollinger (2003)
Horrible on regulatory issues that superseded States rights/10th Amendment
Alaska Department of Environmental Conservation v. EPA (2004) --again the deciding vote (Which evolved over time after Thomas was added to the Court) among other cases where she joined the majority or minority expanding regulatory powers of the Feds
I could go on but this is enough to say she was a huge bust.