I love debuggers but yeah conditional breakpoints are pretty bad. I tend to need to conditionally break when the same code is being called repeatedly with different inputs where only one of them causes the problem. The conditional breakpoint slows things down so much that I'd probably turn to dust before it ever actually halted execution.

And I work in C#, so I have no clue why there's no option to inject the condition and a call to Debugger.Break() and then have the JIT recompile the function live. It would actually make conditional breakpoints usable!