I have lots of experience in three clubs: I was at Chelsea, then Fiorentina, and then Roma. I have good experience.
We know the Premier League is a spectacular league. We would like to play there, but if you take all the positives and all the negatives, it's very difficult to leave Barcelona. If you feel at home and you're from Barcelona it's difficult to change.
There were no Manchester United fans protesting when I left their club in 2005. I wasn't one of their most important players, so I moved on, worked really hard, got my breaks, and my career took off.
I was so used to playing at St Mirren and then Hibs all the time, so it was really important that the next place I was going I was going to play.
I felt the same when I went to Manchester United, to Madrid, to Leverkusen, and now at West Ham. The only pressure I have is my pressure. That's it.
When I left Porto, I knew that I wanted to return to Real Madrid and play.
I'm here now playing for Chelsea. I chose to leave my home at Athletic Bilbao, and it was an important step in my career.
I am used to moving homes in football, and it seems to be a recurring theme in my career.
I went abroad when I was 20, three years at Chelsea, a big club. Then two years at Madrid.
I was looking forward my whole career to once playing somewhere else to get the experience, and if I thought about moving to England, I always had Manchester United in my head.
I just do not see myself playing for Madrid. They do not attract me, especially because of my past with Atletico.
When I left Liverpool, I could have stayed in England but that would have meant joining clubs that didn't play football - just a long-ball game.
