As a coder, I want a bug tracking system to work as a task list for me, and a repository for others. This is a hard dichotomy, but the ideal system would support it.

It's needs a command line interface or at least an open API, integration with Git, easy tagging & querying on tags, batch action tools that are easy (a-la GMail), and in-line editing / status-updates.

It also needs to deal well with a build process, and understand environments.

Good luck.