Well, I started punting in my late twenties, I'm in my late forties now, 20 years later I still love it. The buzz of that door opening (especially with a new face) is hard to match.
As mentioned earlier, the nerves ease with experience but never really go, they do with regs though, with regs I have no nerves whatsoever, to be honest I'm not that nervous with new faces, I am wary with new faces though, there's a difference between being nervous and being wary.