What is your favorite bug/issue tracking system? And why? [closed]

Question

What is your favorite bug/issue tracking system? And why?

(Please answer this question only if you have used at least three different bug tracking systems for quite a long time. And please mention these systems as well.)

Answer 1

FogBugz is actually great, as it's:

• simple to use
• intuitive
• integrates well
• featureful

Answer 2

Trac! It's so nicely integrated with SVN. We just love it.