I am a big time traveler and have been traveling for many years. Every time I am had gone to the country I was born, I am not so happy when I pass the passport control lane. The boarder police in Iran is not that enthusiastic for someone who returns in Iran for a visit. They were not friendly.
In Canada, however usually they are simple and do their job by asking routine question, but very few I have seen so called friendly. However, last time I was returning from Europe to Toronto, the officer asked me about where I have been and what I do for living, the question always I have been asked. When I answered, he returned my passport and simply said "welcome back home"! I was thrilled with this sentence since I have spend my young-hood years in Toronto went to school there and I truly consider my city. This sentence made me to be more proud of being Canadian.