Manchester's not too bad at all! Good public transport links. Not too overwhelming.
Schiphol (Amsterdam) is pretty good for shopping, places to sit and wait, etc. Good public transport links. The transport police a very good there, too.
Vancouver International sucks now that after security, US flights sections is completely separated from the other international flights section and the international flights has nooooo services, but a glass wall separating you from the US flights section and all of the eateries and shops. Awful, awful, awful. Before security, it looks beautiful, but beware the other side. It wasn't always like that.