I do feel that I have unfinished business in the Premier League and now is the right time to return. I considered all the other offers very carefully and I firmly believe that Chelsea is the best choice. They match my footballing ambitions with their hunger and desire to win trophies.
I have been able to fulfil nearly all my ambitions at Chelsea. I have won the Champions League, the League, I have won FA Cups here, but you don't want to stop winning trophies, and being at a big club, you are always fighting to win a trophy.
Of course, the Premier League is one of the trophies we want to win and I think to win the Europa League would be good for the mentality of winning trophies and fighting with the top clubs.
Chelsea is a massive club, you aim to win the Premier League or are challenging for trophies with the aim to win everything.
I went from Chelsea to Fulham - two Premier League teams at the time - and was sitting on the bench for the Europa League and Premier League and you don't think it is going to finish.
What puts you in a different level is if you win the Premier League, and you're capable of challenging every season for the Premier League, and if you play Champions League, and you really believe, and you're a real contender one day to win the Champions League. That's my objective in Tottenham.
I believe that the Premier League is the best league in the world, and having played in the Premier League for such a long time, it is to my advantage, and I know what to expect.
I came back to Chelsea to stay. When I took my decision to come back here from Paris, it was to win the Premier League and to do something again with Chelsea, so I am very happy here.
The Premier League is the best competition in the world, and it's not easy to win a league with great teams like Man United, Chelsea, Liverpool, Man City, and Arsenal as rivals.
I firmly believe that the Premier League is the best league in the world, and when Norwich came in for me, I made the step because I believe that Norwich can kick on again.
I want to thank my two English clubs: Liverpool for bringing me to the Premier League and Chelsea for the trophies I won.
I have been at Chelsea for a lot of years. I have played in the Premier League, the Champions League, it is a kid's dream to play for Chelsea. I have moved on, who knows I might one day go back to Chelsea.
Chelsea is a very demanding club. They need to be in the Champions League and they need to win trophies because that is what the club has been doing for some time.
As for my ambitions with City, I want to win the Premier League and the Champions League.
The Premier League is a very strong league. Chelsea, Manchester City, Arsenal, and Liverpool all have a high quality. But those who know me also know that I always want to win titles. And I think that Manchester United are a club which can win titles.
I've won a lot of trophies - like the FA Youth Cup and the reserves league a couple of times - but it would top it off to win the Premier League with the first team.
The competition that is the Premier League is the biggest challenge in itself. It's my job to get the players to believe that they can go in to every match and win.