The "authorities at passport-check" will likely look at your passport photo, look at you, compare your passport information to what you've written on your entry card (will be given to you on the plane, or you can pick up at customs/immigration), find a clean spot in your passport to put the stamp and send you on your way - with or without a smile depending on how their day is going. I've been in and out many times and NEVER have they spoken to me, let alone ask questions.
Lucky you - a year's visa, multiple entry. Use it and enjoy.