The 32-year-old sealed a move to Geelong as an unrestricted free agent on Friday and signed a two-year contract.
Smith has reportedly turned down a three-year deal from Melbourne as well as a two-year offer from Hawthorn to stay at the club.
Smith spoke for the first time as a Geelong player and said he was “ready for the challenge” after moving away from Hawthorn.
“It was a difficult decision and very difficult (to make),” he told reporters on Friday.
“To be honest, I’ve probably had a few sleepless nights over the past three or four nights. The heart pulled me towards Hawthorn, but in the end the head won.
“I am ready for a new challenge and a new journey and I am very happy to be part of Geelong. You are a great organization.
“This was the right decision for me and my family. In the end, there really wasn’t much between Hawthorn, Melbourne and Geelong.
“Right now that I am in my life, I am very much looking forward to creating a new chapter and seeing a world outside of Hawthorn.
“It was exactly the right decision. My wife and I sat down last night and made the last call. ”
Hawthorn received a third-round pick as compensation under the deal, which is currently Pick 42.
Smith played 210 games for the Hawks in nine seasons and was part of three consecutive Premiership teams between 2013 and 2015.
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