Istanbul is generally considered to be a friendly and welcoming city. The people of Istanbul are known for their hospitality and warm demeanour, and many visitors to the city report feeling welcomed and at home. 

As with any large city, it is always a good idea to be aware of your surroundings and exercise caution, particularly when travelling to unfamiliar areas. 

It is also a good idea to respect local customs and traditions, as this can help to facilitate positive interactions with locals. Overall, Istanbul is a city with a rich and diverse culture that is known for its friendly and welcoming atmosphere.