"I feel well in England," he told Portuguese television.
"I would like to play in Spain one day. I also would like to play in Portugal (again) and Italy, but much more in Spain.
"Many players are talented, but if that talent is not developed they will never go anywhere.
"I keep improving everything I have. Four years ago I was not the player I am now. I improved and I better understand the team-game concept.
"I think I still can improve. My learning process has not finished yet.
"Last season I scored 23 goals and some people doubted that I could do it again.
"This season I have just scored more and things are going fast.
"I aim to score more and shine even more, helping the national team and my club."