The 53-year-old actor, who has been a cast member on the show since 1990, praised writers for refreshing his character Phil Mitchell with exciting storylines.
McFadden told Kent News: "EastEnders keeps me so busy - that is where I'm at and I can't see that changing too soon."
The star - promoting his Aladdin pantomime role - continued: "There's nothing that has quite got the punch of an EastEnders script.
"I think I have a few big ones coming up, but I don't know what they are. I just have them as they come each week.
"I don't really look into the future because they keep me well occupied and weaved in stories, so I don't poke around. I just open the scripts, roll my sleeves up and crack into it when it happens."
McFadden will return to the forefront of the Albert Square soap when his alter ego proposes to ex Sharon on New Year's Day.
Photo gallery - EastEnders Christmas promo shots: