I used to be a TDD zealot. In recent years, I've taken a much more selective approach to test coverage. I typically focus my testing on pieces of code that contain business logic whereas I used to test everything. I've also found automated UI testing is not worth the squeeze and I've had better luck just looking at impacted objects and manually testing those.

I'd be interested to hear if anyone has automated UI testing tools in place that are easier to write test cases for than to just do the manual testing.