Time Enough for Love by Robert A. Heinlein

Good - but it's been a while

Stranger in a Strange Land by Robert A. Heinlein

Great - I want to be from mars!

Ender's Game by Orson Scott Card

Great - Ender is one of my favorite characters and the world that he lives in feels real but with the saturation turned up enough that you notice the insights that Card is making.

A People's History of the United States: 1492-Present by Howard Zinn

Great - This book made be both pissed of at general society and filled with hope that there might be a way out.

The Engines of God by Jack McDevitt

Good - Great characters and an interesting world.

Deepsix by Jack McDevitt

Good - McDevitt doesn't allow me to predict what is going to happen next.