Survey: Challenges Adopting TDD

I've got a few questions that will help shape a few articles and posts that I’d like to do. Please post comments as answers.

  • What sort of challenges have you run into while doing TDD?
  • What challenges stumped you or forced you to come up with a work around?
  • Did anything cause you to stop using TDD?
  • Is there anything stopping you from adopting TDD?

(Note: Your comments won’t show up immediately, as they need to be reviewed to prevent spam. Sorry.)