"Hopefully I can finish a good season here at Man City and there can be good times ahead with England too.
"I spent a bit of time thinking, spoke to friends and am confident I have made the right decision.
"I'm really looking to try and be a part of turning Manchester City, a mid-table team now, into a team challenging for big honours.
"That would be a big thing for me if I can be a part of it and turn it around."
Hughes explained why he had been so keen to make the 30-times capped England utility man his first signing of the summer.
"First and foremost we're getting a player of great Premier League experience," said Hughes. "He's a player I've admired from afar for quite some time, for many years.
"The opportunity to bring a player of Gareth's quality to the club was one we couldn't afford to let pass."
After the on/off transfer saga of his proposed move to Liverpool dragged on the whole of last summer, City moved with impressive speed to capture Barry's signature.
"The fact we moved so quickly took a few people unawares," said Hughes. "But I think that was one of the keys to being able to show our intent and our commitment to Gareth.
"He's very much part of where we see the club and the team going in the future. He's got a big role to play.
"He put some fantastic work and service into his game when he was at Villa so he shouldn't look back on that time and have any regrets about what he was able to produce for Villa.
"Now this is an opportunity and a different stage in his career, an opportunity we hope and fully expect to be a successful club in the near future and I think that's the key to the reason Gareth wanted to come and join us."
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