Dont use the men that pretend to be taxi drivers welcoming you at the airport - they use private vehicles and will charge you an arm and a leg - please only use the official metered taxis!
London is one of the most vibrant destinations in the world. For something a little difference, you can venture out to Primrose Hill and experience a real London village feel with some of the best views over the Capital - the park and the famous hill offer some views not to be missed. You can also have lunch at Trojka, a local 'Russian' cafe which makes very good Blinis :)
I heard there is a lot of violence and kidnapping can happen quite frequently - is this justified or is the perception rather amplified by the Media?
Absolutely LOVE Sydney - an amazing city, very diverse and cosmopolitan - Stayed there for about a week and got to see the Blue Mountains which isnt too far out away from the city and definitely one of the things to do - The fish market in Sydney is also not to be missed whilst the main harbour is a must do, being recognised as one of the best in the world
My Home Town :) I was born in Marseilles and lived there for about 11 years - definitely recommend it as this is by far one of the oldest city in Europe - a lot of history and North African influenced. Head down to the main port or even to Notre dame de la garde for some of the most amazing views from the top of the hill!
Paris is simply one of the most amazing cities in the world. I would really recommend you going to the Mouffetard market on the 5th arrondissement - every Saturday and Sunday. You will get a real flavour of what a French market is: from fruit to vegetables, chocolates to wine, cheese to fresh meat and fish..they have it all. It is sublime and not to be missed!