Foster spent five years at Old Trafford before moving to Birmingham over the summer.
“I don’t really keep up to date with what’s going on [at United],” Foster was quoted as saying by The Guardian.
“I look out for results but nothing more than that. I wouldn’t go back [on the decision to leave]. I had a loan spell at Watford [2005‑2007] and had a great time but this is the best time I’ve had. I think I’m back to my best, I feel good and I’m enjoying my football. I’m playing week in, week out and I’ve been given that chance and it’s working out.”
Foster admits it was the pressure at Old Trafford that was the reason why he left United.
He said: “A club like United is cut-throat, win at all costs, whereas here [at Birmingham] you know you’re not going to win every game but the players that we’ve got, we battle for 90 minutes and don’t give someone a second breath.
“There is more pressure at United, without a doubt. Even if we drew it was the end of the world, two points dropped, regardless if we got back into it in the last minute.”
He added: “At United, if you’re playing you are expected to be one of the best players in the world in your position. It’s as simple as that. Playing well is what you should do anyway. So perhaps here you do get more credit for playing well.”