Manchester was one of the birthplaces of the Industrial Revolution - known as Cottonopolis back then, it's retained a lot of fascinating industrial heritage, there are canals and the city centre is full of Victorian warehouse buildings now converted into apartments, shops etc.
It's a very vibrant busy city and the city centre is surprisingly compact and attractive. It's great for shops and restaurants, a good place if you like Victorian architecture and industrial heritage and a very lively, trendy young city with a strong gay scene.
I absolutely love it, but it's not a "quaint" city of the sort that so many tourists love.