Rigid, Firm, and the Darker the Better
Any cook will tell you, good food is like good porn. With that, I give you this totally double-entendred trip, taken verbatim from the Ladies Home Journal lightstyle section. Really.

Any cook will tell you, good food is like good porn. With that, I give you this totally double-entendred trip, taken verbatim from the Ladies Home Journal lightstyle section:
-Look for rigid spears with firm ends.
-Wrinkled stem ends mean the asparagus is old and may be tough.
-Asparagus tenderness is not related to the thickness of the stalk.
-Color signals the tenderness of the stalks -- the deeper the color the better.
...I have a friend who swears by that last one. Er, she's a home cook, too.