It's funny I was just considering this matter recently. I'm just about to take my skills test for the CPL so have been doing a fair bit of (dual) flying recently and I'd like to think my standard is reasonable and I'm moderately instrument capable etc should I get inadvertent IMC. That being said I had to do a solo flight to make up a couple of hours I am short and I did find myself feeling the nerves on the way to the airport.
I think it's a positive thing - it keeps you on your toes and hopefully means you are more likely to take your time with checklists, flight planning etc. The day you just rock up and take off will probably be the one you make a mistake on...Hopefully one that at worst requires a new pair of trousers.
Safe landings.